Fix previous commit about drag&drop.

modules/gui/qt4/main_interface.cpp

@@ -1134,8 +1134,8 @@ void MainInterface::dropEventPlay( QDropEvent *event, bool b_play )
 
         if( s.length() > 0 ) {
             playlist_Add( THEPL, qtu(s), NULL,
-                          PLAYLIST_APPEND | PLAYLIST_PREPARSE | (first ? PLAYLIST_GO: 0),
-                          PLAYLIST_END, true, false );
+                          PLAYLIST_APPEND | (first ? PLAYLIST_GO: PLAYLIST_PREPARSE),
+                          PLAYLIST_END, true, pl_Unlocked );
             first = false;
             RecentsMRL::getInstance( p_intf )->addRecent( s );
         }