Signals on diagonals have wrong direction info

[Vladki]

Hello,

I have noticed that signals on diagonal track have a but weird direction info. It should show the direction of exit from the tile, bit it shows the entry direction. See the screenshot here:

The signal on left (choose signal) should have direction south, and the signal on right (distant) direction west.

[jamespetts]

I am not sure whether this is really solvable: Simutrans does not really have diagonals: what appear to be diagonals are actually treated in the game as a series of straight lines in a step formation, and the underlying directional information is based on this.

[Vladki]

I thought just using a different value from the ribi might be enough, but I do not know enough about this par of code.