conf: fix class_id bitmap leak in virNetworkObj
conf: fix class_id bitmap leak in virNetworkObj

Commit '07d1b6b' added class_id bitmap to virNetworkObj but never freed
it.

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