商品列表检索为空，返回参处理

yanxuan-wx-store-sharer-biz/src/main/java/com/netease/yanxuan/wx/store/sharer/biz/service/impl/ProductServiceImpl.java

@@ -65,6 +65,9 @@ public class ProductServiceImpl implements IProductService {
             // 使用异步多线程处理
             productList = AsyncUtils.processListAsync(productListVO.getProduct_list(), item -> {
                 WeChatPromoteProductDetailVO detailVO = getProductDetailCache(item.getShop_appid(), item.getProduct_id());
+                if(null == detailVO){
+                    return null;
+                }
                 WeChatPromoteProductDetailVO.WeChatPromoteProductVO product = detailVO.getProduct();
                 if (null == product) {
                     return null;