Don't declare copystring if WXWIN_COMPATIBILITY_2_4==0

(like in include/wx/utils.h).


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@23487 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/list.h

@@ -240,7 +240,9 @@ enum wxKeyType
 
 // due to circular header dependencies this function has to be declared here
 // (normally it's found in utils.h which includes itself list.h...)
+#if WXWIN_COMPATIBILITY_2_4
 extern WXDLLIMPEXP_BASE wxChar* copystring(const wxChar *s);
+#endif
 
 class WXDLLEXPORT wxObjectListNode;
 typedef wxObjectListNode wxNode;