remove wrong notifyChange

jsonform/gadget_json_generated_form_child.js

@@ -2066,12 +2066,14 @@
         evt = arr[0],
         event_object;
       event_object = g.props.add_custom_data[sub_scope];
-      if (event_object && evt.type === "change") {
+      if (evt.type === "change") {
+        if (event_object) {
           return event_object.event();
         }
         return g.rootNotifyChange({
           path: evt.target.name
         });
+      }
     })
     .declareMethod('renderForm', function (options) {
       var g = this,