Re: [PATCH v4 06/14] [GSOC] ref-filter: pass get_object() return value to their callers

> From: ZheNing Hu <adlternative@gmail.com>
> 
> Since in the refactor of `git cat-file --batch` later,
> oid_object_info_extended() in get_object() will be used to obtain
> the info of an object with it's oid. When the object cannot be
> obtained in the git repository, `cat-file --batch` expects to output
> "<oid> missing" and continue the next oid query instead of letting
> Git exit. In other error conditions, Git should exit normally. So we
> can achieve this function by passing the return value of get_object().
>