wxX11:

Rewrote wxRegion.
     Killed backing store Pixmap.
     Killed wxRectList.
     Adapted wxWindow to the above.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14105 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/x11/private.h

@@ -13,10 +13,12 @@
 #define _WX_PRIVATE_H_
 
 #include "wx/defs.h"
+#include "wx/utils.h"
 #include "X11/Xlib.h"
 
 class wxMouseEvent;
 class wxKeyEvent;
+class wxWindow;
 
 // ----------------------------------------------------------------------------
 // common callbacks