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/helpxxxx.h

@@ -23,7 +23,7 @@ class WXDLLEXPORT wxXXXXHelpController: public wxHelpControllerBase
 
  public:
   wxXXXXHelpController();
-  ~wxXXXXHelpController();
+  virtual ~wxXXXXHelpController();
 
   // Must call this to set the filename and server name
   virtual bool Initialize(const wxString& file);