'number of cars' feature is broken

[RiedleroD]

when setting the number of cars to 0 and the locomotive to -c, it leaves a trail behind, presumably because it doesn't feature any …cleanup characters, if you know what I mean.

when setting the number of cars to something very high, performance seems to suffer a lot (and it cuts off somewhere between 100 and 200 cars - maybe 128?)

when setting the number of cars to something ridiculously high, all sorts of random shit happens, from not starting at all to starting with an incorrect amount of cars, to being fast as fuck… etc.

[ilmanzo]

same with -G, number of cars option is not honored