id 代码的修正

@@ -37,7 +37,7 @@ const _getProductAdditionInfoAsync = (data) => {
         let productId = data.id || 0;
         let uid = data.uid ? data.uid : 0;
         let skn = data.erpProductId;
-        let brandId = data.brand.id ? data.brand.id : 0;
+        let brandId = data.brand && data.brand.id ? data.brand.id : 0;
         let index = 0;
 
         // 获取相关数据