fetch: don't redundantly NULL something calloc() gave us
Stop redundantly NULL-ing the last element of the refs structure,
which was retrieved via calloc(), and is thus guaranteed to be
pre-NULL'd.
This code dates back to
b888d61c83 ("Make fetch a builtin",
2007-09-10), where wasn't any reason to do this back then either, it's
just boilerplate left over from when git-fetch was initially
introduced.
The motivation for this change was to make a subsequent change which
would also modify the refs variable smaller, since it won't have to
copy this redundant "NULL the last + 1 item" pattern.
We may not end up keeping that change, but as this pattern is still
pointless, so let's fix it.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>