修复收藏的商品没有default_images时报错的bug

@@ -237,7 +237,7 @@ class UserModel
                 $product = array();
                 foreach ($val['new_product'] as $one) {
                     $product = array();
-                    $product['imgUrl'] = Images::getImageUrl($one['default_images'], 235, 314);
+                    $product['imgUrl'] = (isset($one['default_images']) && !empty($one['default_images'])) ? Images::getImageUrl($one['default_images'], 235, 314) : '';
                     $product['price'] = !empty($one['market_price']) ? '¥' . $one['market_price'] . '.00' : 0;
                     $product['discount'] = !empty($one['sales_price']) ? '¥' . $one['sales_price'] . '.00' : 0;