D3DBase: Fall back to creating a normal context when debug fails

This can happen if the user does not have an up to date version of
the DirectX SDK, as Microsoft intentionally broke it and requires
users to install the W8 SDK.

Source/Plugins/Plugin_VideoDX11/Src/D3DBase.cpp

@@ -334,15 +334,27 @@ HRESULT Create(HWND wnd)
 	swap_chain_desc.BufferDesc.Height = yres;
 
 #if defined(_DEBUG) || defined(DEBUGFAST)
-	D3D11_CREATE_DEVICE_FLAG device_flags = (D3D11_CREATE_DEVICE_FLAG)(D3D11_CREATE_DEVICE_DEBUG|D3D11_CREATE_DEVICE_SINGLETHREADED);
-#else
-	D3D11_CREATE_DEVICE_FLAG device_flags = D3D11_CREATE_DEVICE_SINGLETHREADED;
+	// Creating debug devices can sometimes fail if the user doesn't have the correct
+	// version of the DirectX SDK. If it does, simply fallback to a non-debug device.
+	{
+		hr = PD3D11CreateDeviceAndSwapChain(adapter, D3D_DRIVER_TYPE_UNKNOWN, NULL,
+											D3D11_CREATE_DEVICE_SINGLETHREADED | D3D11_CREATE_DEVICE_DEBUG,
+											supported_feature_levels, NUM_SUPPORTED_FEATURE_LEVELS,
+											D3D11_SDK_VERSION, &swap_chain_desc, &swapchain, &device,
+											&featlevel, &context);
+	}
+
+	if (FAILED(hr))
 #endif
-	hr = PD3D11CreateDeviceAndSwapChain(adapter, D3D_DRIVER_TYPE_UNKNOWN, NULL, device_flags,
-										supported_feature_levels, NUM_SUPPORTED_FEATURE_LEVELS,
-										D3D11_SDK_VERSION, &swap_chain_desc, &swapchain, &device,
-										&featlevel, &context);
-	if (FAILED(hr) || !device || !context || !swapchain)
+	{
+		hr = PD3D11CreateDeviceAndSwapChain(adapter, D3D_DRIVER_TYPE_UNKNOWN, NULL,
+											D3D11_CREATE_DEVICE_SINGLETHREADED,
+											supported_feature_levels, NUM_SUPPORTED_FEATURE_LEVELS,
+											D3D11_SDK_VERSION, &swap_chain_desc, &swapchain, &device,
+											&featlevel, &context);
+	}
+
+	if (FAILED(hr))
 	{
 		MessageBox(wnd, _T("Failed to initialize Direct3D.\nMake sure your video card supports at least D3D 10.0"), _T("Dolphin Direct3D 11 backend"), MB_OK | MB_ICONERROR);
 		SAFE_RELEASE(device);