修改salebrand 逻辑

@@ -159,7 +159,9 @@ exports.getSaleIndexData = (channel) => {
 
         // 折扣专场活动处理
         if (result[1].code === 200) {
-            finalResult.brandSale = saleHandler.handleSaleActivityData(result[1].data, channel);
+            if (result[1].data.length > 0) {
+                finalResult.brandSale = saleHandler.handleSaleActivityData(result[1].data, channel);
+            }
         } else {
             logger.error('discount activities api code no 200');
         }