fix(接口定义): 修复场景报告取消排序报错的缺陷

--bug=1015405 --user=王孝刚 【接口测试】测试报告-场景/用例按名称升序/降序后-取消升序/降序报错
https://www.tapd.cn/55049933/s/1212598

frontend/src/business/components/api/automation/report/ApiReportList.vue

@@ -264,7 +264,7 @@ export default {
       this.selectDataCounts = 0;
 
       this.condition.reportType = this.reportType;
-      if (this.condition.orders) {
+      if (this.condition.orders && this.condition.orders.length > 0) {
         let order = this.condition.orders[this.condition.orders.length - 1];
         this.condition.orders = [];
         this.condition.orders.push(order);