ctlslot_visible
if (!ctlslot_visible(s, c))
if (!ctlslot_visible(s, c))
refs_mask = ctlslot_visible(s, c) ? s->self : 0;
if (ctlslot_visible(s, c))
refs_mask = ctlslot_visible(s, c) ? s->self : 0;
int ctlslot_visible(struct ctlslot *, struct ctl *);
if (ctlslot_visible(f->ctlslot, c))
type = ctlslot_visible(f->ctlslot, c) ?
if (!ctlslot_visible(f->ctlslot, c))