core: Another GLib 2.30 build fix
core: Another GLib 2.30 build fix

sujitfulse/ostree,sujitfulse/ostree,gatispaeglis/ostree,GNOME/ostree,leandrosansilva/ostree,leandrosansilva/ostree,leandrosansilva/ostree,gatispaeglis/ostree,gatispaeglis/ostree,resin-io/ostree,sujitfulse/ostree,leandrosansilva/ostree,gatispaeglis/ostree,gatispaeglis/ostree,gatispaeglis/ostree,GNOME/ostree,GNOME/ostree,sujitfulse/ostree,resin-io/ostree,leandrosansilva/ostree,sujitfulse/ostree,resin-io/ostree,GNOME/ostree,resin-io/ostree,resin-io/ostree,GNOME/ostree