New AI deadlock on Territorial Hellkite

[Territorial Hellkite](https://magiccards.info/c17/en/29.html) used to be a great card for the AI because it would force it to attack someone other than the player it decided it wanted to attack until they're dead. Unfortunately, the latest version (1.4.30V2) deadlocked. It's unclear who computer was trying to kill at this stage of the game.

> 7:56 PM: computer casts Territorial Hellkite [bbc]
> 7:56 PM: computer puts Territorial Hellkite [bbc] from stack onto the Battlefield
> 7:56 PM: Ability triggers: Territorial Hellkite [bbc] - At the beginning of combat on your turn, choose an opponent at random that Territorial Hellkite [bbc] didn't attack during your last combat. Territorial Hellkite [bbc] attacks that player this combat if able. If you can't choose an opponent this way, tap Territorial Hellkite [bbc].
> 7:56 PM: Territorial Hellkite [bbc] has to attack computerb.