Update 12 patch 1

Build 496 - fixed a major issue and a smaller bug

• Fixed a game-breaking bug that happened when disabling the take-off / landing animation displays, after loading a new map it wouldn't create enemy spawners which in turn broke the construction feature making the game unplayable. The fix is retroactive, so if you have a save that was broken because of this issue, it should automatically repair the save when you load it.
  
• Fixed a bug that prevented the connections between tesla towers to be displayed after showing the landing animation.