Clear unused stack region that may refer freed objects; fix #3596
gc_interval_ratio_get(mrb_state *mrb, mrb_value obj)
{
  return mrb_fixnum_value(mrb->gc.interval_ratio);
}

gc_interval_ratio_get(mrb_state *mrb, mrb_value obj)
{
  return mrb_fixnum_value(mrb->gc.interval_ratio);
}
