Some codepaths call make_absolute_path with its own return value as
input. In such a cases, return the path immediately.
This fixes a valgrind-discovered error, whereby we tried to copy a
string onto itself.
Signed-off-by: Carlos Martín Nieto <cmn@elego.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>