In this particular case it seems fairly unlikely that there will be any significant consequences. At worst, the game source code might now be forced into a GPL

In this particular case it seems fairly unlikely that there will be any significant consequences. At worst, the game source code might now be forced into a GPL license. It's mostly worthless at this point anyway. It is interesting to wonder how this case may have been handled if it was overall more relevant, though. I think a court might assess the actual value of that one function and say that it was something like fair use. Might be a bigger problem if there's a lot more, though.