fixed emitting groupDragged event in callback

lib/timeline/component/ItemSet.js

@@ -1597,9 +1597,9 @@ ItemSet.prototype._onGroupDragEnd = function (event) {
   			}
 
           }
-          
-          me.body.emitter.emit('groupDragged', { groupId: this.groupTouchParams.group.groupId });
         });
+        
+        me.body.emitter.emit('groupDragged', { groupId: id });
 	}
 }