rename method to prevent collision with some BSD definitions of macro Free()

(detected compiling mahogany)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15982 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mac/listbox.h

@@ -138,7 +138,8 @@ protected:
     bool HasMultipleSelection() const;
 
     // free memory (common part of Clear() and dtor)
-    void Free();
+    // prevent collision with some BSD definitions of macro Free()   
+    void FreeData();
 
     int m_noItems;
     int m_selected;