Doom II German Version Question

Does the sector in Map15 containing the secret exit exist in the German version of Doom II? If it does, what happens if you attempt to use that exit teleporter, which would lead to a map that does not exist in that version of the game?

This was recently covered in this thread...

The code checks for the existence of MAP31, and if it's not there then the secret exit in MAP15 acts as an alternate regular exit.