tree 9bb2ca1fed86a9b7f29a15397fccc2e6199a4c82
parent 0a0670ed7e600d9dbdb2fc77d6f1f5da741f2592
author Zac Medico <zmedico@gentoo.org> 1321650665 -0800
committer Zac Medico <zmedico@gentoo.org> 1321650665 -0800

_prepare_self_update: detect if already called

This is should never be triggered by portage, but it's possible that
an API consumer might trigger it somehow.