cleanup res.error overly complex

ayanova/src/components/gz-data-table.vue

@@ -518,7 +518,7 @@ export default {
           listView: untokenizedListView
         })
         .then(res => {
-          if (res.error != undefined) {
+          if (res.error) {
             throw res.error;
           } else {
             //NOTE: This is how to call an async function and await it from sync code
@@ -774,7 +774,7 @@ function populateSelectionLists(vm) {
   return window.$gz.api
     .get("DataListView/ViewList?ListKey=" + vm.dataListKey)
     .then(res => {
-      if (res.error != undefined) {
+      if (res.error) {
         window.$gz.errorHandler.handleFormError(res.error, vm);
       } else {
         vm.selectLists.listViews = res.data;
@@ -792,7 +792,7 @@ function fetchListView(vm) {
     return;
   }
   return window.$gz.api.get("DataListView/" + vm.listViewId).then(res => {
-    if (res.error != undefined) {
+    if (res.error) {
       window.$gz.errorHandler.handleFormError(res.error, vm);
     } else {
       vm.listView = res.data.listView;