parse.y:5562
static int
local_cnt(id)
    ID id;
{
    int cnt, max;

    if (id == 0) return lvtbl->cnt;

    for (cnt=1, max=lvtbl->cnt+1; cnt<max;cnt++) {
	if (lvtbl->tbl[cnt] == id) return cnt-1;
    }
    return local_append(id);
}
