People might perhaps maybe want to right-click anywhere

modules/gui/qt4/components/playlist/standardpanel.cpp

@@ -150,7 +150,7 @@ void StandardPLPanel::search( QString searchText )
 
 void StandardPLPanel::doPopup( QModelIndex index, QPoint point )
 {
-    assert( index.isValid() );
+    if( !index.isValid() ) return;
     QItemSelectionModel *selection = view->selectionModel();
     QModelIndexList list = selection->selectedIndexes();
     model->popup( index, point, list );