builtin-archive: do not free a tree held by the object layer.
builtin-archive: do not free a tree held by the object layer.

Found by running "git archive --format=tar HEAD" in Documentation/
directory.

It's surprising that nobody has noticed this from the beginning...

Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git