修复结算页面赠品的价格显示（显示为0.00）

@@ -413,6 +413,7 @@ class CartModel
                     //gift=>是否赠品,advanceBuy=>是否加价购;
                     if ($single['goods_type'] == 'gift' && !isset($single['isAdvanceBuy'])) {
                         $oneGoods['gift'] = true;
+                        $oneGoods['price'] = Helpers::transPrice($single['sale_price']);
                     } elseif ($single['goods_type'] == 'price_gift') {
                         $oneGoods['advanceBuy'] = true;
                         $oneGoods['price'] = Helpers::transPrice($single['sale_price']);