Add tests for XShape extension API in configure,

and implements wxTLW::SetShape for wxMotif and wxX11
using the aforementioned extension.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@20102 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/x11/toplevel.h

@@ -79,6 +79,8 @@ protected:
     // set the icon for the window
     void DoSetIcon( const wxIcon& icon );
 
+    virtual bool SetShape(const wxRegion& region);
+
     // For implementation purposes - sometimes decorations make the
     // client area smaller
     virtual wxPoint GetClientAreaOrigin() const;