!19 新增购物车时，SkuInfo库存字段和CartItemDto库存字段不一致,导致前端购物车无法修改数量

Merge pull request !19 from Fxz/master

mall-oms/oms-boot/src/main/java/com/youlai/mall/oms/service/impl/CartServiceImpl.java

@@ -87,6 +87,7 @@ public class CartServiceImpl implements ICartService {
             SkuInfoDTO skuInfo = skuFeignService.getSkuInfo(skuId).getData();
             if (skuInfo != null) {
                 BeanUtil.copyProperties(skuInfo,cartItem);
+                cartItem.setStock(skuInfo.getStockNum());
                 cartItem.setCount(1);
                 cartItem.setChecked(true);
             }