Fix clang-tidy warnings (#4359)

The warnings included recommendations of braces for if statement
readability, a recommendation for default initialization of an int
array, and include-what-you-use (indirectly through clang-tidy reporting
undefined symbols).

wpigui/src/main/native/directx11/wpigui_directx11.cpp

@@ -69,8 +69,9 @@ static bool CreateDeviceD3D(HWND hWnd) {
           nullptr, D3D_DRIVER_TYPE_HARDWARE, nullptr, createDeviceFlags,
           featureLevelArray, 2, D3D11_SDK_VERSION, &sd,
           &gPlatformContext->pSwapChain, &gPlatformContext->pd3dDevice,
-          &featureLevel, &gPlatformContext->pd3dDeviceContext) != S_OK)
+          &featureLevel, &gPlatformContext->pd3dDeviceContext) != S_OK) {
     return false;
+  }
 
   CreateRenderTarget();
   return true;