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/protocol/file.h

@@ -26,7 +26,7 @@ protected:
   wxProtocolError m_error;
 public:
   wxFileProto();
-  ~wxFileProto();
+  virtual ~wxFileProto();
 
   wxProtocolError GetError() { return m_error; }
   bool Abort() { return TRUE; }