New code for Update() under GTK 2.0. Added

native GdkRegion() constructor to wxRegion.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16490 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk1/window.h

@@ -201,8 +201,11 @@ public:
     GdkICAttr           *m_icattr;
 #endif
 
+#ifndef __WXGTK20__
     // The area to be cleared (and not just refreshed)
+    // We cannot make this distinction under GTK 2.0.
     wxRegion             m_clearRegion;
+#endif
 
     // scrolling stuff
     GtkAdjustment       *m_hAdjust,*m_vAdjust;