scene_opened lacks production.theater.active_stage

I needed access to the active Stage from a method I called in scene_opened on a Player. I was trying to get it through the Production:

 production.theater.active_stage

but it hadn't been populated yet.

I worked around it by calling stage_activated on the theater, with the stage passed into scene_opened:

 def scene_opened(e)
   production.theater.stage_activated(e)

   Java::trptcolin.main.TicTacToe.newGame(production.view)
 end