vz: set localhost as vnc address
vz: set localhost as vnc address

We should set localhost as vnc address in case of empty string.
Because Virtuozzo sets 0.0.0.0 as default vnc address.

datto/libvirt,eskultety/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,crobinso/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,taget/libvirt,olafhering/libvirt,nertpinx/libvirt,andreabolognani/libvirt,eskultety/libvirt,eskultety/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,zippy2/libvirt,taget/libvirt,VenkatDatta/libvirt,libvirt/libvirt,zippy2/libvirt,crobinso/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,datto/libvirt,olafhering/libvirt,taget/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,datto/libvirt,jfehlig/libvirt,jfehlig/libvirt,jardasgit/libvirt,zippy2/libvirt,taget/libvirt,eskultety/libvirt,andreabolognani/libvirt,olafhering/libvirt,jfehlig/libvirt,eskultety/libvirt,olafhering/libvirt,nertpinx/libvirt,crobinso/libvirt,libvirt/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,jardasgit/libvirt,nertpinx/libvirt,datto/libvirt,jfehlig/libvirt,nertpinx/libvirt,datto/libvirt,libvirt/libvirt,zippy2/libvirt,taget/libvirt,libvirt/libvirt,crobinso/libvirt,jardasgit/libvirt,jardasgit/libvirt