校验商品库存，当库存为0是不可添加

shopping-cart-application-service/src/main/java/cn/freemud/service/impl/ShoppingCartNewServiceImpl.java

@@ -1241,7 +1241,7 @@ public class ShoppingCartNewServiceImpl implements ShoppingCartNewService {
         }
         if (availableStocks != null && ResponseCodeConstant.RESPONSE_SUCCESS_STR.equals(availableStocks.getCode()) &&
                 (CollectionUtils.isEmpty(availableStocks.getResult()) || availableStocks.getResult().get(0).getQty() == null
-                        || availableStocks.getResult().get(0).getQty() <= qty)) {
+                        || availableStocks.getResult().get(0).getQty() < qty)) {
             throw new ServiceException(ResponseResult.SHOPPING_CART_STOCK_NOT_HAVE);
         }
     }