Fix some clippy warnings, update dependencies

Cargo.lock

 dependencies = [
  "libc 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
  "cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-demangle 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gleam 0.4.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gleam 0.4.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 
 [[package]]
 name = "clap"
-version = "2.29.1"
+version = "2.29.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ansi_term 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
 name = "deltamap"
 version = "0.1.0"
 dependencies = [
- "clap 2.29.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "env_logger 0.5.0-rc.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clap 2.29.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "env_logger 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "gl 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gl_generator 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "image 0.18.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "linked-hash-map 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "osmpbf 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "reqwest 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "reqwest 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo-glutin 0.13.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "xdg 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 
 [[package]]
 name = "env_logger"
-version = "0.5.0-rc.2"
+version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "atty 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
 
 [[package]]
 name = "gleam"
-version = "0.4.18"
+version = "0.4.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "gl_generator 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 
 [[package]]
 name = "httparse"
-version = "1.2.3"
+version = "1.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "hyper"
-version = "0.11.13"
+version = "0.11.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "base64 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bytes 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures-cpupool 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "httparse 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "httparse 1.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "language-tags 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "futures 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
- "hyper 0.11.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hyper 0.11.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "native-tls 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-core 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-io 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 
 [[package]]
 name = "reqwest"
-version = "0.8.2"
+version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
- "hyper 0.11.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hyper 0.11.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper-tls 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libflate 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime_guess 2.0.0-alpha.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "native-tls 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 dependencies = [
  "libc 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 
 [[package]]
 name = "winapi"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "winapi-i686-pc-windows-gnu 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi-x86_64-pc-windows-gnu 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 
 [[package]]
 name = "winapi-i686-pc-windows-gnu"
-version = "0.3.2"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
-version = "0.3.2"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
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-"checksum clap 2.29.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8f4a2b3bb7ef3c672d7c13d15613211d5a6976b6892c598b0fcb5d40765f19c2"
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 "checksum enum_primitive 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "be4551092f4d519593039259a9ed8daedf0da12e5109c5280338073eaeb81180"
-"checksum env_logger 0.5.0-rc.2 (registry+https://github.com/rust-lang/crates.io-index)" = "65f98e626dd2495a575f6036dd73c9176b656dd73d8bdf8119f2cf5223a2ec4a"
+"checksum env_logger 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f98112cf5e30982be3514040871a6f310504a7406ce1936691649353ec0607e9"
 "checksum error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ff511d5dc435d703f4971bc399647c9bc38e20cb41452e3b9feb4765419ed3f3"
 "checksum flate2 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)" = "e6234dd4468ae5d1e2dbb06fe2b058696fdc50a339c68a393aefbf00bc81e423"
 "checksum foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
 "checksum gif 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e2e41945ba23db3bf51b24756d73d81acb4f28d85c3dccc32c6fae904438c25f"
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-"checksum gleam 0.4.18 (registry+https://github.com/rust-lang/crates.io-index)" = "437fdf7818d999b299e159611d7bb733fc7bcee683640ec2275b7d38a70688dd"
-"checksum httparse 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "af2f2dd97457e8fb1ae7c5a420db346af389926e36f43768b96f101546b04a07"
-"checksum hyper 0.11.13 (registry+https://github.com/rust-lang/crates.io-index)" = "7af072bf3403369fd4339d550a7612c94ce681a22ca3a5455e68983fa4b3648c"
+"checksum gleam 0.4.19 (registry+https://github.com/rust-lang/crates.io-index)" = "4f756699879522bc654ecc44ad42ad14c59803c2dacfa5a67a7fc27257a8b4e9"
+"checksum httparse 1.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "c2f407128745b78abc95c0ffbe4e5d37427fdc0d45470710cfef8c44522a2e37"
+"checksum hyper 0.11.14 (registry+https://github.com/rust-lang/crates.io-index)" = "f57f74deb81fb91b776012ed7605e96b1ffb88c4fd5c031ce5c90534b604a6e0"
 "checksum hyper-tls 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9c81fa95203e2a6087242c38691a0210f23e9f3f8f944350bd676522132e2985"
 "checksum idna 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "014b298351066f1512874135335d62a789ffe78a9974f94b43ed5621951eaf7d"
 "checksum image 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d1576ffa01849c91b484b95c01d54dddc242b4d50923eaa2d4d74a58c4b9e8fd"
 "checksum regex 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "744554e01ccbd98fff8c457c3b092cd67af62a555a43bfe97ae8a0451f7799fa"
 "checksum regex-syntax 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "8e931c58b93d86f080c734bfd2bce7dd0079ae2331235818133c8be7f422e20e"
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-"checksum reqwest 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "3161ca63fd11ce36c7718af239e6492a25a3dbfcec54240f959b9d816cf42413"
+"checksum reqwest 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8080379de728e9bf2be6bd5b52348978a5525e7d4a25f106ce73953fe7e810d9"
 "checksum rustc-demangle 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "aee45432acc62f7b9a108cc054142dac51f979e69e71ddce7d6fc7adf29e817e"
 "checksum safemem 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e27a8b19b835f7aea908818e871f5cc3a5a186550c30773be987e155e8163d8f"
 "checksum schannel 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "acece75e0f987c48863a6c792ec8b7d6c4177d4a027f8ccc72f849794f437016"
 "checksum version_check 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6b772017e347561807c1aa192438c5fd74242a670a6cffacc40f2defd1dc069d"
 "checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
-"checksum winapi 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "b09fb3b6f248ea4cd42c9a65113a847d612e17505d6ebd1f7357ad68a8bf8693"
+"checksum winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "04e3bd221fcbe8a271359c04f21a76db7d0c6028862d1bb5512d85e1e2eb5bb3"
 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
-"checksum winapi-i686-pc-windows-gnu 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "ec6667f60c23eca65c561e63a13d81b44234c2e38a6b6c959025ee907ec614cc"
-"checksum winapi-x86_64-pc-windows-gnu 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "98f12c52b2630cd05d2c3ffd8e008f7f48252c042b4871c72aed9dc733b96668"
+"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
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 "checksum x11-dl 2.17.2 (registry+https://github.com/rust-lang/crates.io-index)" = "28ec50063128cfdbdfe683b0504a3740e07b779c7c75fa26e941218b5f95e098"

src/main.rs

 }
 
 fn dur_to_sec(dur: Duration) -> f64 {
-    dur.as_secs() as f64 + dur.subsec_nanos() as f64 * 1e-9
+    dur.as_secs() as f64 + f64::from(dur.subsec_nanos()) * 1e-9
 }
 
 fn main() {
         rctrl_pressed: false,
     };
 
-    let fps: f64 = matches.value_of("fps").map(|s| s.parse().unwrap()).unwrap_or(config.fps());
+    let fps: f64 = matches.value_of("fps").map(|s| s.parse().unwrap()).unwrap_or_else(|| config.fps());
     let duration_per_frame = Duration::from_millis((1000.0 / fps - 0.5).max(0.0).floor() as u64);
-    info!("milliseconds per frame: {}",
-          duration_per_frame.as_secs() as f64 * 1000.0
-          + duration_per_frame.subsec_nanos() as f64 * 1e-6);
+    info!("milliseconds per frame: {}", dur_to_sec(duration_per_frame) * 0.001);
 
     // estimated draw duration
     let mut est_draw_dur = duration_per_frame;

src/map_view_gl.rs

                 remainder_opt.map(|r| r.len()),
                 max_tiles_to_use);
 
-            if max_tiles_to_use <= 0 {
+            if max_tiles_to_use == 0 {
                 warn!("tile cache is too small for this view.");
                 return Err(num_draws);
             }