[Libvir] PATCH: Fix paravirt FB with xm driver

The code for dealing with the paravirt framebuffer was missing code to deal with an explicit vncdisplay=N setting - only working for vncunused=1. It was also not flexible enough in processing the 2 different styles of FB config. 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 -=|