Qt: fix a crash when you don't want to have the recent items. And don't even show the menu.

modules/gui/qt4/menus.cpp

@@ -315,9 +315,12 @@ QMenu *QVLCMenu::FileMenu( intf_thread_t *p_intf, QWidget *parent )
     addDPStaticEntry( menu, qtr( "Open &Location from clipboard" ),
                       NULL, SLOT( openUrlDialog() ), "Ctrl+V" );
 
+    if( config_GetInt( p_intf, "qt-recentplay" ) )
+    {
         recentsMenu = new QMenu( qtr( "&Recent Media" ), menu );
         updateRecents( p_intf );
         menu->addMenu( recentsMenu );
+    }
     menu->addMenu( SDMenu( p_intf, menu ) );
     menu->addSeparator();
 

modules/gui/qt4/recents.cpp

@@ -53,7 +53,7 @@ RecentsMRL::RecentsMRL( intf_thread_t *_p_intf ) : p_intf( _p_intf )
     free( psz_tmp );
 
     load();
-    if ( !isActive ) clear();
+    if( !isActive ) clear();
 }
 
 RecentsMRL::~RecentsMRL()
@@ -89,7 +89,7 @@ void RecentsMRL::clear()
     if ( stack->isEmpty() )
         return;
     stack->clear();
-    QVLCMenu::updateRecents( p_intf );
+    if( !isActive ) QVLCMenu::updateRecents( p_intf );
     save();
 }