Technically incorrect comment about chocolate-doom

[andwj]

I think the comment just means that a thing with type 0 in a map is accepted (and ignored) by Vanilla DOOM because it gets treated like a player start. I certainly don't interpret it as saying something about negative values of thing types.

I just tested a map with a thing of type 0 in it, and the Vanilla DOOM.EXE did play the map without any crash. Whatever memory is corrupted by a thing of type 0 does not seem critical to the game working.