[XP Script] Disallow No Weapon

Code:
# Disallow No Weapon~ By Jirbytaylor

class Scene_Equip

  def update_item

    # If B button was pressed

    if Input.trigger?(Input::B)

      # Play cancel SE

      $game_system.se_play($data_system.cancel_se)

      # Activate right window

      @right_window.active = true

      @item_window.active = false

      @item_window.index = -1

      return

    end

    # If C button was pressed

    if Input.trigger?(Input::C)

      # Get currently selected data on the item window

      item = @item_window.item

      # Change equipment, check if weapon selected

      if @right_window.index == 0

        if item == nil

          $game_system.se_play($data_system.buzzer_se)

        else

          $game_system.se_play($data_system.equip_se)

          @actor.equip(@right_window.index, item == nil ? 0 : item.id)

        end

      else

        $game_system.se_play($data_system.equip_se)

        @actor.equip(@right_window.index, item == nil ? 0 : item.id)

      end

      # Activate right window

      @right_window.active = true

      @item_window.active = false

      @item_window.index = -1

      # Remake right window and item window contents

      @right_window.refresh

      @item_window.refresh

      return

    end

  end

end