class Scene_Battle < Scene_Base

  alias zpatch_yem_u update unless $@
  def update
    correct_battlewindow_class
    zpatch_yem_u
  end

  def correct_battlewindow_class
    return if @message_window.is_a?(Window_BattleMessageMelody) !=
       $game_switches[20]
    v = @message_window.visable
    @message_window.dispose
    if $game_switches[20]
      @message_window = Window_BattleMessageMelody.new
    else
      @message_window = Window_BattleMessage.new
    end
    @message_window.visible = v
  end

end