sk_SSL_COMP_value
ctmp = sk_SSL_COMP_value(sk, i);
*comp = sk_SSL_COMP_value(comp_methods, i);
comp = sk_SSL_COMP_value(sctx->comp_methods, i);
comp = sk_SSL_COMP_value(sctx->comp_methods, m);
comp = sk_SSL_COMP_value(sctx->comp_methods, m);
const SSL_COMP *c = sk_SSL_COMP_value(ssl_comp_methods, j);