视图无引擎刷新逻辑调整

@VIEW/@MACRO/VIEW_HEADER-BASE.vue.ftl

@@ -199,7 +199,7 @@ export default class ${srfclassname('${view.name}')}Base extends Vue {
               _this.engine.load();
               <#if viewdata_block??>${viewdata_block}</#if>
             });
-        } else if(!Object.is(newVal, oldVal) && _this.refresh() && Object.is(_this.$util.typeOf(_this.refresh()), 'function')) {
+        } else if(!Object.is(newVal, oldVal) && _this.refresh && _this.refresh instanceof Function) {
             _this.refresh();
         }
     }