[PATCH] erofs-utils: add ERR_CAST macro

[Gao Xiang]

On 2023/7/11 11:55, Jingbo Xu wrote:
> Add ERR_CAST macro.
> 
> Signed-off-by: Jingbo Xu <jefflexu at linux.alibaba.com>

I'd like to apply it with the following commit message:

"Add ERR_CAST macro to prepare for the upcoming tarerofs feature."

Thanks,
Gao Xiang