Fix warning

Author: dklassic

src/platform/windows/wgl/connection.rs

@@ -133,7 +133,7 @@ impl Connection {
 
         match raw_handle {
             Win32(handle) => Ok(NativeWidget {
-                window_handle: handle.hwnd as HWND,
+                window_handle: HWND(handle.hwnd.get() as *mut c_void),
             }),
             _ => Err(Error::IncompatibleNativeWidget),
         }

src/platform/windows/wgl/device.rs

@@ -145,7 +145,7 @@ impl Device {
 
         unsafe {
             let mut d3d11_device = Default::default();
-            let mut d3d11_feature_level = ptr::null_mut();
+            let d3d11_feature_level = ptr::null_mut();
             let mut d3d11_device_context = Default::default();
             let result = D3D11CreateDevice(
                 None,
@@ -218,12 +218,10 @@ impl Device {
     /// The reference count on the D3D 11 device is increased before returning.
     #[inline]
     pub fn native_device(&self) -> NativeDevice {
-        unsafe {
-            let d3d11_device = self.d3d11_device.clone();
-            NativeDevice {
-                d3d11_device,
-                gl_dx_interop_device: self.gl_dx_interop_device,
-            }
+        let d3d11_device = self.d3d11_device.clone();
+        NativeDevice {
+            d3d11_device,
+            gl_dx_interop_device: self.gl_dx_interop_device,
         }
     }
 

src/platform/windows/wgl/surface.rs

@@ -171,8 +171,8 @@ impl Device {
                 CPUAccessFlags: 0,
                 MiscFlags: D3D11_RESOURCE_MISC_SHARED_KEYEDMUTEX.0 as u32,
             };
-            let mut d3d11_texture = Default::default();
-            let mut result =
+            let d3d11_texture = Default::default();
+            let result =
                 self.d3d11_device
                     .CreateTexture2D(&d3d11_texture2d_desc, None, d3d11_texture);
             if !result.is_ok() {
@@ -190,7 +190,7 @@ impl Device {
             // across contexts.
             let result = dxgi_resource.as_ref().unwrap().GetSharedHandle();
             assert!(result.is_ok());
-            let mut dxgi_share_handle = result.unwrap();
+            let dxgi_share_handle = result.unwrap();
             assert_ne!(dxgi_share_handle, INVALID_HANDLE_VALUE);
 
             // Tell GL about the share handle.