[SUGGESTION] Ability to detect non-cybersyn trains

[RomanKornev]

I was copy-pasting some trains and somehow ended up with a train that just went back and forth on the same route, ignoring any conditions and filling up the cargo beyond the requested amount.

I was able to use the indev menu to figure out that that train was NOT actually part of the cybersyn network, even though it went through the depot multiple times (setting a filter for that particular item showed 0 results). Deleting that train fixed the issue but it would be nice to have some sort of a warning when a train is visiting a cybersyn station without it being connected to the network.

For anyone who wants to check their current network for zombie trains, use this:

/c
local trains = remote.call("cybersyn", "read_global", "trains")
game.print("Number of trains in cybersyn: " .. table_size(trains))

local game_trains = game.surfaces[1].get_trains()
game.print("Number of trains in game: " .. #game_trains)

The counts should be identical, ignoring any shuttle trains.

[RomanKornev]

Turns out the problem had nothing to do with this. The depot had a couple of stations missing the combinator. #150