Fix potiential seg fault in parse_id().
Fix potiential seg fault in parse_id().

It's possible to hit a seg fault with calling VSSDComponent's vssd_to_rasd(), VSSD's get_vssd_by_ref(), or VirtualSystemSnapshotService's destroy_snapshot().

Signed-off-by: Kaitlin Rupert <5d963ff58691ce861c80ea2b0deed9b0b88171bc@us.ibm.com>

libvirt/libvirt-cim,libvirt/libvirt-cim,libvirt/libvirt-cim