修复getAppFoodCodeList没有真正实现的bug.

business/partner/purchase/mtwm/store_sku2.go

@@ -275,6 +275,12 @@ func (p *PurchaseHandler) createOrUpdateStoreSkus(ctx *jxcontext.Context, storeI
 }
 
 func getAppFoodCodeList(l []*mtwmapi.AppFoodResult) (vendorSkuIDs []string) {
+	if len(l) > 0 {
+		vendorSkuIDs = make([]string, len(l))
+		for k, v := range l {
+			vendorSkuIDs[k] = v.AppFoodCode
+		}
+	}
 	return vendorSkuIDs
 }