core: Call correct callback in handle_real
core: Call correct callback in handle_real

Was working by chance only

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