fix: 没有工程特征列的时候会报错问题

web/building_saas/main/js/views/project_view.js

@@ -2311,7 +2311,7 @@ var projectObj = {
                 return  item.data.field == "itemCharacterText";
             })
         }
-        return !this.itemCol.visible;
+        return this.itemCol && !this.itemCol.visible;
     },
     onCommonTotalFeeButtonClick:function(hitinfo) {
         let me = calcBaseView;