mark all dtors which are virtual because base class dtor is virtual explicitly virtual themselves

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41020 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mac/carbon/minifram.h

@@ -34,7 +34,7 @@ public:
       Create(parent, id, title, pos, size, style | wxFRAME_TOOL_WINDOW | wxFRAME_FLOAT_ON_PARENT , name);
   }
 
-  ~wxMiniFrame() {}
+  virtual ~wxMiniFrame() {}
 protected:
 };