CRED_SMALLGROUPS_NB
gid_t smallgroups[CRED_SMALLGROUPS_NB];
if (gidsetsize > CRED_SMALLGROUPS_NB)
gid_t smallgroups[CRED_SMALLGROUPS_NB];
if (gidsetsize > CRED_SMALLGROUPS_NB)
groups = wcred->sc_supp_groups_nb <= CRED_SMALLGROUPS_NB ?
gid_t smallgroups[CRED_SMALLGROUPS_NB];
gid_t cr_smallgroups[CRED_SMALLGROUPS_NB];