Merge pull request #1417 from TheRealDust/fixed-lints

Fixed Dead Code Warning

src/sdl2/video.rs

@@ -547,6 +547,7 @@ impl GLContext {
 pub struct WindowContext {
     subsystem: VideoSubsystem,
     raw: *mut sys::SDL_Window,
+    #[allow(dead_code)]
     pub(crate) metal_view: sys::SDL_MetalView,
 }