in_delmulti
in_delmulti(lmsg->u.ms_resultp);
in_delmulti(imo->imo_membership[i]);
void in_delmulti (struct in_multi *);
in_delmulti(imo->imo_membership[0]);
in_delmulti(imo->imo_membership[i]);
in_delmulti(imo->imo_membership[i]);