[Ready for Merge] Pit Bugfix

@kopareigns I've stared at this code for too long, and I haven't made any progress. Would you mind taking a look at what's going on and try to figure out why the Pit is broken?

To recreate the bug, just build the Farmyard and the kennels (but not the stables and cages) and set a dog as active, then go into the Pit and set it to slave-vs-animal.