sww --修复app-mpicker bug

src/components/app-mpicker/app-mpicker.tsx

@@ -96,7 +96,9 @@ export default class AppMpicker extends Vue {
                 Object.assign(param, { srfreferdata: this.activeData });
             }
             this.$http.post(`${this.url}${this.name}/ac`, param).then((data: any) => {
-                this.items = data.items;
+                if(data.items){
+                    this.items = data.items;
+                }
             })
         }
     }