lxc: avoid NULL dereference upon getmntent failure
lxc: avoid NULL dereference upon getmntent failure

* src/lxc_container.c (lxcContainerUnmountOldFS): Don't pass
a NULL pointer to qsort.

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