修复bug

one_stop_public/libs/ChildForm.jsx

@@ -104,7 +104,7 @@ export default class ChildForm extends React.Component {
         const gutter = json.gutter != null ? json.gutter : 0
         const rights = this.props.rights
         const xx =  form.getFieldValue(base52)
-        if(objs!=null){
+        if(objs!=null&&xx!=null){
             for(var x in objs){
                 if(xx[x]!=null)objs[x]=xx[x]
             }