[gentoo-portage-dev] PATCH: properly handle metadata transfer on first sync of an empty tree (#96410)

[Brian D. Harring]

Hola all, patch (incvs now) to fix up a traceback on first sync with 
an empty tree; bug #96410
http://bugs.gentoo.org/show_bug.cgi?id=96410

The fix isn't exactly what I'd call pretty (creating an intermediate 
portdbapi and config instance to do the updates), but it's a corner 
case; config's categories is a bit of a hack, and tearing it out in 
stable is more work then worth... so this.

Either way, it's attached, poke at it kindly :)
~harring