Qt extended panels: do not spam about options about modules that don't exist in 1.2

modules/gui/qt4/components/extended_panels.cpp

@@ -396,6 +396,7 @@ void ExtVideo::initComboBoxItems( QObject *widget )
 {
     QComboBox *combobox = qobject_cast<QComboBox*>( widget );
     if( !combobox ) return;
+
     QString option = OptionFromWidgetName( widget );
     module_config_t *p_item = config_FindConfig( VLC_OBJECT( p_intf ),
                                                  qtu( option ) );
@@ -505,6 +506,7 @@ void ExtVideo::setWidgetValue( QObject *widget )
         free( val.psz_string );
     }
     else
+        if( p_obj )
             msg_Err( p_intf,
                      "Module %s's %s variable is of an unsupported type ( %d )",
                      qtu( module ),