[Libguestfs] [PATCH] Combine common code in daemon/tar.c.

Note: should be no semantic change after this patch, but this patch is required before the next patch I'm about to post. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v