forbid copying wxEvtHandlers

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14461 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -54,6 +54,9 @@ All (GUI):
 - wxImage::ComputeHistogram()'s signature changed to 
   unsigned long ComputeHistogram(wxImageHistogram&) const
 
+- wxEvtHandler cannot be copied/assigned any longer - this never worked but
+  now it results in compile-time error instead of run-time crashes
+
 wxMSW:
 
 - build system changed: setup.h is not a static file in include/wx any more

include/wx/event.h

@@ -1894,8 +1894,8 @@ protected:
     virtual void DoSetClientData( void *data );
     virtual void *DoGetClientData() const;
 
-
 private:
+    DECLARE_NO_COPY_CLASS(wxEvtHandler)
     DECLARE_DYNAMIC_CLASS(wxEvtHandler)
 };