make_affine!

static VALUE ossl_ec_point_make_affine(VALUE self)
{
    EC_POINT *point;
    const EC_GROUP *group;

    GetECPoint(self, point);
    GetECPointGroup(self, group);

    if (EC_POINT_make_affine(group, point, ossl_bn_ctx) != 1)
        ossl_raise(cEC_POINT, "EC_POINT_make_affine");

    return self;
}