core: Assume parent of parentless item to be root
core: Assume parent of parentless item to be root

Pelagicore/Media-Manager-Rygel-patched,GNOME/rygel,Tarnyko/rygel,luisbg/rygel,Tarnyko/rygel,Pelagicore/Media-Manager-Rygel-patched,GNOME/rygel,jku/rygel,Pelagicore/Media-Manager-Rygel-patched,jku/rygel,GNOME/rygel