QtCreator/QtDesigner don't understand their own classes

Wrapping the  Ui:: UI  class in a  QScopedPointer, a  perfectly proper
thing to do, causes QtDesigner to fail to grok the code.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@5019 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

mainwindow.cpp

@@ -463,6 +463,7 @@ MainWindow::~MainWindow()
   QByteArray cfname=fname.toLocal8Bit();
   fftwf_export_wisdom_to_filename(cfname);
   m_audioThread->wait ();
+  delete ui, ui = 0;
 }
 
 //-------------------------------------------------------- writeSettings()