fix： 子表删除报错问题修复

src/business/platform/form/formrender/dynamic-form/dynamic-form-table-item.vue

@@ -26,7 +26,7 @@
       :row="row"
       :code="code"
       :main-code="mainCode"
-      :readonly="models.readonly ? models.readonly : readonly"
+      :readonly="models && models.readonly ? models.readonly : readonly"
       :params="params"
       :is-table="true"
       v-on="listeners"