Date#marshal_dump_old

NDEBUG
static VALUE
d_lite_marshal_dump_old(VALUE self)
{
    VALUE a;

    get_d1(self);

    a = rb_ary_new3(3,
                    m_ajd(dat),
                    m_of_in_day(dat),
                    DBL2NUM(m_sg(dat)));

    if (FL_TEST(self, FL_EXIVAR)) {
        rb_copy_generic_ivar(a, self);
        FL_SET(a, FL_EXIVAR);
    }

    return a;
}