Re: [PATCH v5 1/9] ref: initialize "fsck_ref_report" with zero

> In "fsck.c::fsck_refs_error_function", we need to tell whether "oid" and
> "referent" is NULL. So, we need to always initialize these parameters to
> NULL instead of letting them point to anywhere when creating a new
> "fsck_ref_report" structure.
>
> The original code explicitly initializes the "path" member in the
> "struct fsck_ref_report" to NULL (which implicitly 0-initializes other
> members in the struct). It is more customary to use "{ 0 }" to express
> that we are 0-initializing everything. In order to align with the the