[0.11.3] Game crash with poor train scripting

[Kikkers]

I tried setting the locomotive active field to false, which crashes the game without extra notice.

I'm guessing this was never intended to work (I'm now setting manualmode on the train itself, which works just fine), but it would be nice to have it not crash the game rightout.

[kovarex]

Hello, thanks for pointing that out.

There are some problems with the active value of rolling stocks, so I just disabled the ability to deactivate it completely.