sk_SCT_value
if ((sct_len = i2o_SCT(sk_SCT_value(a, i), &p)) == -1)
if ((sct_len = i2o_SCT(sk_SCT_value(a, i), NULL)) == -1)
SCT *sct = sk_SCT_value(sct_list, i);
SCT *sct = sk_SCT_value(scts, i);
int res = SCT_set_source(sk_SCT_value(s, i), source);
sct = sk_SCT_value(scts, i);
sct = sk_SCT_value(scts, 0);