When commit_lock_file() fails, it now always calls
rollback_lock_file() internally, so there is no need to call that
function here.
Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu>
Reviewed-by: NJonathan Nieder <jrnieder@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>