Plug memory leak in verify_one_pack() by freeing the struct packed_git
we got from add_packed_git(). Also rename g to pack and pull an
assignment out of an if statement while we're at it.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <junkio@cox.net>