fix(js/list): add response code check for merch info request

优化商家信息接口请求的响应处理，增加返回码和数据有效性校验，避免异常数据赋值

pages_promotion/merch/public/js/list.js

@@ -148,10 +148,12 @@ export default {
 			this.$api.sendRequest({
 				url: '/merch/api/merch/merchinfo',
 				data: {
-					merch_id:this.merch_id
+					merch_id: this.merch_id
 				},
-			success: res => {
-				this.merch = res.data
+				success: res => {
+					if (res.code >= 0 && res.data) {
+						this.merch = res.data;
+					}
 				}
 			});
 		},