ctf_list_next
if (ctf_list_next(&cd->cd_nodes[prec]) == NULL)
for (cdp = ctf_list_next(&cd.cd_nodes[prec]);
cdp != NULL; cdp = ctf_list_next(cdp)) {
for (cdp = ctf_list_next(&cd->cd_nodes[i]);
ndp = ctf_list_next(cdp);