Remove unnecessary header dependencies. Fix resulting compilation

problems for wxMSW, wxGTK, wxMotif, wxX11 and wxMac in default
configuration. Non-default configurations will probably need some more
fixes.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@19172 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/image.h

@@ -18,7 +18,9 @@
 #include "wx/object.h"
 #include "wx/string.h"
 #include "wx/gdicmn.h"
-#include "wx/bitmap.h"
+#if WXWIN_COMPATIBILITY_2_2
+#  include "wx/bitmap.h"
+#endif
 #include "wx/hashmap.h"
 
 #if wxUSE_STREAMS
@@ -35,6 +37,7 @@
 
 class WXDLLEXPORT wxImageHandler;
 class WXDLLEXPORT wxImage;
+class WXDLLEXPORT wxPalette;
 
 //-----------------------------------------------------------------------------
 // wxImageHandler