modifications for compilation under Mac OS X

applied patches extracted from submission by Marc Newsam (tested under Mac OS 9)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9372 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mac/palette.h

@@ -16,6 +16,7 @@
 #pragma interface "palette.h"
 #endif
 
+#include "wx/colour.h"
 #include "wx/gdiobj.h"
 
 class WXDLLEXPORT wxPalette;