code review by hf: do modify product detail page add to cart code

@@ -168,7 +168,7 @@ class DetailModel
                 foreach ($baseInfo['goodsList'] as $value) {
                     $sizeList = array();
                     $colorStorageNum = 0;
-                    $sizeStorageStr = ''; // clear to empty
+                    $sizeStorageStr = '';
                     
                     // 商品分组
                     if (isset($value['goodsImagesList'])) {
@@ -210,7 +210,7 @@ class DetailModel
                     // 缩略图
                     $thumbImageList[] = array('img' => Helpers::getImageUrl($value['colorImage'], 60, 60) );
                     
-                    // 统计每个尺码对应的各个颜色的库存量
+                    // 统计尺码对应的各个颜色的库存量
                     foreach ($sizeList as &$sizeArr) {
                         $sizeArr['colorNumStr'] = implode('/', array_values($colorStorageGroup[ $sizeArr['name'] ]) );
                     }