fixed bug with calling Destroy() on the NULL wxSocket

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11418 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/sockets/server.cpp

@@ -334,7 +334,6 @@ void MyFrame::OnServerEvent(wxSocketEvent& event)
   else
   {
     m_text->AppendText(_("Error: couldn't accept a new connection\n\n"));
-    sock->Destroy();
     return;
   }