SYMBOL_CHECK
menu->sym->flags |= SYMBOL_CHECK | SYMBOL_CHECKED;
choice->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
choice->flags &= ~SYMBOL_CHECK;
menu->sym->flags &= ~SYMBOL_CHECK;
if (sym->flags & SYMBOL_CHECK) {
sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
sym->flags &= ~SYMBOL_CHECK;