Last checkpoint not converting to a stoptimer (visual effect)

The last checkpoints in levels without stoptimers should "convert" to a stoptimer. E.g. 3 checkpoints, when you've hit 2 of them the last one will look like a stoptimer. This is an old feature but it was bugged and didn't work. Fixed now. It does the same for the starttimer in circuit which then looks like a stoptimer after you hit the first CP.