Fix incorrect default when overridden in use
Fix incorrect default when overridden in use

jonfoster/pyxb-upstream-mirror,pabigot/pyxb,pabigot/pyxb,balanced/PyXB,CantemoInternal/pyxb,CantemoInternal/pyxb,CantemoInternal/pyxb,balanced/PyXB,jonfoster/pyxb-upstream-mirror,jonfoster/pyxb2,jonfoster/pyxb1,jonfoster/pyxb2,balanced/PyXB,jonfoster/pyxb2,jonfoster/pyxb-upstream-mirror,jonfoster/pyxb1