Qt4 - Volume, when clicked on the icon, mute and change the icon to the muted one.

modules/gui/qt4/components/interface_widgets.hpp

@@ -184,7 +184,9 @@ public:
     {
         if (e->type() == QEvent::MouseButtonPress )
         {
+            /* Mute it */
             aout_VolumeMute( p_intf, NULL );
+            m->updateVolume( 0 );
             return true;
         }
         return false;