qemu: fix typo in spice migration code
qemu: fix typo in spice migration code

This typo caused XPath returning improper value and thus not
working spice after migration.

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