[Libvir] PATCH: Check for bogus default architecture

There was a missing check in the QEMU driver for a bogus architecture in the XML which could cause a crash. This wasn't a problem except for the fact that another bug in my recent virt-install 0.200.0 release passed a bogus architecture on 32-bit platforms :-( Regards, Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|