修复购物车选择和全选按钮报错的bug（接收参数名错误导致）

Code Review By Rock Zhang

@@ -78,7 +78,7 @@ class IndexController extends AbstractAction
         $result = array();
 
         if ($this->isAjax()) {
-            $productId = $this->post('id', 0);
+            $productId = $this->post('skuList', 0);
             $uid = $this->getUid(true);
             $shoppingKey = Helpers::getShoppingKeyByCookie();
             $result = CartModel::selectGoods($uid, $productId, $shoppingKey);