libvirt/xen: fix some partial function application errors
libvirt/xen: fix some partial function application errors

thomassa/xenopsd,thomassa/xenopsd,koushikcgit/xenopsd,djs55/xenopsd,euanh/xenopsd,euanh/xenopsd,djs55/xenopsd-previous,johnelse/xenopsd,djs55/xenopsd,djs55/xenopsd,johnelse/xenopsd,simonjbeaumont/xenopsd,simonjbeaumont/xenopsd,euanh/xenopsd,simonjbeaumont/xenopsd,koushikcgit/xenopsd,djs55/xenopsd-previous,cheng--zhang/xenopsd,johnelse/xenopsd,thomassa/xenopsd,koushikcgit/xenopsd,cheng--zhang/xenopsd,cheng--zhang/xenopsd,djs55/xenopsd-previous