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/ipcbase.h

@@ -49,7 +49,7 @@ public:
   wxConnectionBase(wxChar *buffer, int size); // use external buffer
   wxConnectionBase(); // use internal, adaptive buffer
   wxConnectionBase(const wxConnectionBase& copy);
-  ~wxConnectionBase(void);
+  virtual ~wxConnectionBase(void);
 
   void SetConnected( bool c ) { m_connected = c; }
   bool GetConnected() { return m_connected; }