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

@@ -144,16 +144,18 @@ export default {
 		};
 	},
 	methods: {
-		getMerch(){
-			this.$api.sendRequest({
-				url: '/merch/api/merch/merchinfo',
-				data: {
-					merch_id:this.merch_id
-				},
-			success: res => {
-				this.merch = res.data
-				}
-			});
+		getMerch(){
+			this.$api.sendRequest({
+				url: '/merch/api/merch/merchinfo',
+				data: {
+					merch_id: this.merch_id
+				},
+				success: res => {
+					if (res.code >= 0 && res.data) {
+						this.merch = res.data;
+					}
+				}
+			});
 		},
 		/**
 		 * 获取优惠券数据