lock_daemon: Simplify error handling
lock_daemon: Simplify error handling

No need to check the run_dir variable twice for NULL.

nertpinx/libvirt,shugaoye/libvirt,VenkatDatta/libvirt,zippy2/libvirt,nertpinx/libvirt,siboulet/libvirt-openvz,siboulet/libvirt-openvz,andreabolognani/libvirt,datto/libvirt,rlaager/libvirt,taget/libvirt,libvirt/libvirt,trainstack/libvirt,libvirt/libvirt,agx/libvirt,jardasgit/libvirt,elmarco/libvirt,datto/libvirt,taget/libvirt,agx/libvirt,taget/libvirt,iam-TJ/libvirt,cbosdo/libvirt,crobinso/libvirt,datto/libvirt,cbosdo/libvirt,olafhering/libvirt,fabianfreyer/libvirt,elmarco/libvirt,eskultety/libvirt,eskultety/libvirt,fabianfreyer/libvirt,crobinso/libvirt,elmarco/libvirt,nertpinx/libvirt,jardasgit/libvirt,zippy2/libvirt,eskultety/libvirt,taget/libvirt,taget/libvirt,cbosdo/libvirt,VenkatDatta/libvirt,rlaager/libvirt,elmarco/libvirt,zhlcindy/libvirt-1.1.4-maintain,rlaager/libvirt,zhlcindy/libvirt-1.1.4-maintain,olafhering/libvirt,cbosdo/libvirt,olafhering/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,zhlcindy/libvirt-1.1.4-maintain,iam-TJ/libvirt,rlaager/libvirt,datto/libvirt,crobinso/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,trainstack/libvirt,trainstack/libvirt,libvirt/libvirt,iam-TJ/libvirt,jardasgit/libvirt,andreabolognani/libvirt,rlaager/libvirt,zippy2/libvirt,cbosdo/libvirt,olafhering/libvirt,shugaoye/libvirt,trainstack/libvirt,VenkatDatta/libvirt,agx/libvirt,iam-TJ/libvirt,zhlcindy/libvirt-1.1.4-maintain,siboulet/libvirt-openvz,jardasgit/libvirt,eskultety/libvirt,nertpinx/libvirt,jardasgit/libvirt,agx/libvirt,agx/libvirt,zhlcindy/libvirt-1.1.4-maintain,siboulet/libvirt-openvz,nertpinx/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,libvirt/libvirt,trainstack/libvirt,jfehlig/libvirt,andreabolognani/libvirt,trainstack/libvirt,crobinso/libvirt,andreabolognani/libvirt,elmarco/libvirt,siboulet/libvirt-openvz,shugaoye/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,iam-TJ/libvirt,iam-TJ/libvirt,shugaoye/libvirt,jfehlig/libvirt,eskultety/libvirt,datto/libvirt,zippy2/libvirt,iam-TJ/libvirt,shugaoye/libvirt,trainstack/libvirt