correcting list delete (delete task from this list as well)

dal/TaskGateway.php

@@ -45,7 +45,8 @@ class TaskGateway
             if($table == 'task'){
                 $query='DELETE FROM Tache WHERE id = :id';
             } else {
-                $query='DELETE FROM uList WHERE id = :id';
+                $query='DELETE FROM uList WHERE id = :id;
+                        DELETE FROM Tache WHERE idList = :id;';
             }
             $this->con->executeQuery($query, array(
             ':id'=>array($id,PDO::PARAM_STR)));