xen_hypervisor.c: avoid NULL deref for NULL domain argument
xen_hypervisor.c: avoid NULL deref for NULL domain argument

* src/xen/xen_hypervisor.c (xenHypervisorGetVcpus): Don't attempt
to diagnose an unlikely NULL-domain or NULL-domain->conn error.

jeckersb/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,rmarwaha/libvirt,olafhering/libvirt,leilihh/libvirt,bjzhang/libvirt,wiedi/libvirt,iam-TJ/libvirt,rlaager/libvirt,olafhering/libvirt,emaste/libvirt,rbu/libvirt,dumbbell/libvirt,novel/fbsd-libvirt,bjzhang/libvirt,rmarwaha/libvirt,shugaoye/libvirt,jardasgit/libvirt,soulxu/libvirt-xuhj,danwent/libvirt-ovs,leilihh/libvirt,rbu/libvirt,dumbbell/libvirt,usc-isi/libvirt,nertpinx/libvirt,bjzhang/libvirt,cbosdo/libvirt,rmarwaha/libvirt1,trainstack/libvirt,wiedi/libvirt,crobinso/libvirt,zhlcindy/libvirt-1.1.4-maintain,trainstack/libvirt,kantai/libvirt-vfork,leilihh/libvirt,fabianfreyer/libvirt,emaste/libvirt,amery/libvirt-vserver,trainstack/libvirt,eskultety/libvirt,crobinso/libvirt,soulxu/libvirt-xuhj,jardasgit/libvirt,jeckersb/libvirt,jardasgit/libvirt,leilihh/libvirt,VenkatDatta/libvirt,datto/libvirt,rmarwaha/libvirt1,trainstack/libvirt,bjzhang/libvirt,amery/libvirt-vserver,amery/libvirt-vserver,agx/libvirt,olafhering/libvirt,wiedi/libvirt,zippy2/libvirt,danwent/libvirt-ovs,dumbbell/libvirt,elmarco/libvirt,fabianfreyer/libvirt,wiedi/libvirt,fabianfreyer/libvirt,rmarwaha/libvirt,jardasgit/libvirt,jeckersb/libvirt,jeckersb/libvirt,foomango/libvirt,cbosdo/libvirt,andreabolognani/libvirt,crobinso/libvirt,andreabolognani/libvirt,kantai/libvirt-vfork,emaste/libvirt,trainstack/libvirt,dumbbell/libvirt,agx/libvirt,elmarco/libvirt,nertpinx/libvirt,jfehlig/libvirt,warewolf/libvirt,shugaoye/libvirt,zippy2/libvirt,nertpinx/libvirt,elmarco/libvirt,amery/libvirt-vserver,jfehlig/libvirt,leilihh/libvirt,rlaager/libvirt,VenkatDatta/libvirt,zhlcindy/libvirt-1.1.4-maintain,andreabolognani/libvirt,danwent/libvirt-ovs,siboulet/libvirt-openvz,foomango/libvirt,soulxu/libvirt-xuhj,cbosdo/libvirt,rbu/libvirt,libvirt/libvirt,warewolf/libvirt,rmarwaha/libvirt1,taget/libvirt,cbosdo/libvirt,emaste/libvirt,iam-TJ/libvirt,danwent/libvirt-ovs,jeckersb/libvirt,emaste/libvirt,eskultety/libvirt,novel/fbsd-libvirt,wiedi/libvirt,siboulet/libvirt-openvz,soulxu/libvirt-xuhj,warewolf/libvirt,danwent/libvirt-ovs,rmarwaha/libvirt,jfehlig/libvirt,dumbbell/libvirt,wiedi/libvirt,elmarco/libvirt,usc-isi/libvirt,kantai/libvirt-vfork,zippy2/libvirt,kantai/libvirt-vfork,foomango/libvirt,fabianfreyer/libvirt,novel/fbsd-libvirt,datto/libvirt,taget/libvirt,andreabolognani/libvirt,datto/libvirt,rbu/libvirt,emaste/libvirt,elmarco/libvirt,shugaoye/libvirt,VenkatDatta/libvirt,foomango/libvirt,jfehlig/libvirt,wiedi/libvirt,trainstack/libvirt,taget/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,siboulet/libvirt-openvz,olafhering/libvirt,zippy2/libvirt,datto/libvirt,novel/fbsd-libvirt,novel/fbsd-libvirt,agx/libvirt,warewolf/libvirt,usc-isi/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,nertpinx/libvirt,warewolf/libvirt,novel/fbsd-libvirt,taget/libvirt,rmarwaha/libvirt1,iam-TJ/libvirt,eskultety/libvirt,dumbbell/libvirt,zhlcindy/libvirt-1.1.4-maintain,cbosdo/libvirt,novel/fbsd-libvirt,rlaager/libvirt,VenkatDatta/libvirt,libvirt/libvirt,novel/fbsd-libvirt,libvirt/libvirt,shugaoye/libvirt,agx/libvirt,usc-isi/libvirt,rbu/libvirt,usc-isi/libvirt,amery/libvirt-vserver,datto/libvirt,taget/libvirt,iam-TJ/libvirt,rmarwaha/libvirt1,leilihh/libvirt,bjzhang/libvirt,rmarwaha/libvirt,trainstack/libvirt,zhlcindy/libvirt-1.1.4-maintain,siboulet/libvirt-openvz,kantai/libvirt-vfork,crobinso/libvirt,soulxu/libvirt-xuhj,zhlcindy/libvirt-1.1.4-maintain,eskultety/libvirt,jardasgit/libvirt,warewolf/libvirt,nertpinx/libvirt,eskultety/libvirt,libvirt/libvirt,agx/libvirt,rmarwaha/libvirt1,iam-TJ/libvirt,rlaager/libvirt,fabianfreyer/libvirt,iam-TJ/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,rmarwaha/libvirt,warewolf/libvirt,emaste/libvirt,shugaoye/libvirt,rlaager/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,foomango/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,novel/fbsd-libvirt,jeckersb/libvirt,iam-TJ/libvirt,siboulet/libvirt-openvz,jeckersb/libvirt