WRG: change virtual method of Qt signal.

Code/Wrappers/QtWidget/otbWrapperQtWidgetParameterBase.h

@@ -48,7 +48,7 @@ protected slots:
   void ParameterChanged(const QString& key);
 
 signals:
-  virtual void ParameterActiveStatus(bool value);
+  void ParameterActiveStatus(bool value);
 
 protected:
   QtWidgetModel* GetModel();