First, we indexed the colour array without a required offset.
Second, the data type was too small and overflowed negative.
Detected during a refactor, which this is a part of.
I'm not entirely sure, but it looks like some people might not like
jokes about the Holocaust.
On a more serious note, the project has become more serious over
the 7 or so years of its existence.
Přemysl Eric Janouch