[PATCH] staging: erofs: use the wrapped PTR_ERR_OR_ZERO instead of open code

[Chao Yu]

On 2018/7/30 9:51, Gao Xiang wrote:
> Just clean up and logic doesn't change.
> 
> Link: https://lists.01.org/pipermail/kbuild-all/2018-July/050766.html
> Fixes: d72d1ce60174 ("staging: erofs: add namei functions")
> Reported-by: kbuild test robot <lkp at intel.com>
> Signed-off-by: Gao Xiang <gaoxiang25 at huawei.com>

Reviewed-by: Chao Yu <yuchao0 at huawei.com>
Thanks,