Re: [PATCH 05/10] object-file API: provide a hash_object_file_oideq()

> Provide a new hash_object_file_oideq() for those callers of
> check_object_signature() that don't care about its streaming
> interface. I.e. at the start of that function we do:
>
> 	if (map) {
> 		hash_object_file(r->hash_algo, map, size, type, real_oid);
> 		return !oideq(oid, real_oid) ? -1 : 0;
> 	}
>
> These callers always provide a "map" (or "buf[fer]"). Let's have them
> call this simpler hash_object_file_oideq() function instead.
>
> None of them use a non-NULL "real_oid" argument, but let's provide it
> like check_object_signature() did. This'll make it easy to have these
> emit better error messages in the future as was done in
> 96e41f58fe1 (fsck: report invalid object type-path combinations,
> 2021-10-01), i.e. the die() calls here can emit not only the OID we
> expected, but also what we got.