windows: fix crash on close

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@7209 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/VideoCommon/Src/EmuWindow.cpp

@@ -221,9 +221,6 @@ LRESULT CALLBACK WndProc( HWND hWnd, UINT iMsg, WPARAM wParam, LPARAM lParam )
 		PostMessage(m_hParent, WM_USER, WM_USER_SETCURSOR, 0);
 		return true;
 
-	case WM_DESTROY:
-		g_video_backend->Shutdown();
-		break;
 	default:
 		return DefWindowProc(hWnd, iMsg, wParam, lParam);
 	}

Source/Plugins/Plugin_VideoSoftware/Src/Win32.cpp

@@ -164,10 +164,6 @@ LRESULT CALLBACK WndProc( HWND hWnd, UINT iMsg, WPARAM wParam, LPARAM lParam )
 		}
 		break;
 
-	case WM_DESTROY:
-		g_video_backend->Shutdown();
-		break;
-
 	// Called when a screensaver wants to show up while this window is active
 	case WM_SYSCOMMAND:
 		switch (wParam)