Pierre-Yves David <pierre-yves.david@logilab.fr> [Fri, 20 Jan 2012 19:41:18 +0100] rev 15955
discovery: ensure that missingheads are always heads of everything we tried
This only alter the third block executed when:
* repo have secret changeset
* onlyheads is not None
In other case findcommonoutgoing already had this behavior