Shuffle #includes to get proper definition of NULL for picky C++ compilers.

r=pepper


git-svn-id: svn://10.0.0.236/trunk@59007 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/gfx/src/gtk/nsGCCache.cpp

@@ -21,8 +21,8 @@
  *   Stuart Parmenter <pavlov@netscape.com>
  */
 
-#include "nsGCCache.h"
 #include <stdio.h>
+#include "nsGCCache.h"
 /* The GC cache is shared among all windows, since it doesn't hog
    any scarce resources (like colormap entries.) */
 static struct GCData gc_cache [30] = { { 0, }, };