修复预售商品或者普通商品又一个为0时 顶部栏不显示

@@ -86,7 +86,9 @@ class CartModel
                 $result['isEmptyCart'] = true;
                 break;
             }
-            
+            if ($ordinaryCount === '0' || $advanceCount === '0') {
+                $result['cartNav'] = false;
+            }
             /* 普通购物车 */
             $result['commonGoodsCount'] = $ordinaryCount;
             $result['commonCart'] = self::procCartData($cart['ordinary_cart_data'], $onlyGift, $onlyAdvanceBuy);