typo in guest agent channel timeout handling

Change-Id: I63a8a5aa098101ebb3e3c4de2b2dddae4c158490
Signed-off-by: Michal Skrivanek <michal.skrivanek@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/17456
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Tested-by: Dan Kenigsberg <danken@redhat.com>