Fix crash in LXC driver open method when URI has no path
Fix crash in LXC driver open method when URI has no path

If giving a lxc://  URI instead of lxc:/// the open method
would crash ona NULL pointer

* src/lxc/lxc_driver.c: Cope with a NULL URI path

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