Added event Clone functions

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12615 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

contrib/src/gizmos/dynamicsash.cpp

@@ -84,6 +84,8 @@ public:
     wxDynamicSashReparentEvent();
     wxDynamicSashReparentEvent(wxObject *object);
 
+    virtual wxEvent* Clone() const { return NULL; }
+
     DECLARE_DYNAMIC_CLASS(wxDynamicSashReparentEvent);
 };