Split VideoBackend::Cleanup from Shutdown.

First is called from ogl/d3d thread, second is called from emulation thread (x11...)

Source/Plugins/Plugin_VideoDX11/Src/VideoBackend.h

@@ -15,6 +15,7 @@ class VideoBackend : public VideoBackendHardware
 	std::string GetName();
 
 	void Video_Prepare();
+	void Video_Cleanup();
 
 	void ShowConfig(void* parent);
 

Source/Plugins/Plugin_VideoDX11/Src/main.cpp

@@ -207,6 +207,7 @@ void VideoBackend::Shutdown()
 {
 	s_BackendInitialized = false;
 
+	// TODO: should be in Video_Cleanup
 	if (g_renderer)
 	{
 		s_efbAccessRequested = FALSE;
@@ -234,4 +235,7 @@ void VideoBackend::Shutdown()
 	}
 }
 
+void VideoBackend::Video_Cleanup() {
+}
+
 }