drose: compile in multiproc environment

panda/src/dxgsg9/wdxGraphicsBuffer9.cxx

@@ -18,6 +18,7 @@
 
 #include "wdxGraphicsPipe9.h"
 #include "wdxGraphicsBuffer9.h"
+#include "dxGraphicsStateGuardian9.h"
 #include "pStatTimer.h"
 
 

panda/src/dxgsg9/wdxGraphicsBuffer9.h

@@ -22,7 +22,7 @@
 #include "pandabase.h"
 #include "graphicsBuffer.h"
 #include "dxgsg9base.h"
-
+#include "dxTextureContext9.h"
 
 ////////////////////////////////////////////////////////////////////
 //       Class : wdxGraphicsBuffer9