Fix saving states on mesa3d and clean up the handling of asynchronous requests

(those originating from a thread other than the gpu thread)

glxMakeCurrent is supposed to error out when the context is
still current in another thread. NVIDIA handles that, but mesa3d errors.



git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6054 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_VideoDX11/Src/VertexManager.cpp

@@ -35,6 +35,7 @@
 #include "NativeVertexFormat.h"
 #include "NativeVertexWriter.h"
 #include "TextureCache.h"
+#include "main.h"
 
 #include "BPStructs.h"
 #include "XFStructs.h"