more fixes for using wxSocket in console applications (patch 1756260)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48723 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/gsockmsw.h

@@ -62,6 +62,8 @@ public:
   GAddress *GetPeer();
   GSocketError SetServer();
   GSocket *WaitConnection();
+  // not used under MSW
+  void Notify(bool WXUNUSED(enable)) { }
   bool SetReusable();
   bool SetBroadcast();
   bool DontDoBind();