My vertical scrolling was broken, so the screenshots I was expecting
after the successful completion of some of these tests were incorrect.
Mind you, none of those tests actually test the vertical scrolling,
so the fact that they were previously passing was very much correct,
it's just that the final "Test passed" screenshot was incorrect.
There is little point in strictly enforcing that a given test ROM suceeds
on a given frame as those frame numbers come from my emulator anyway,
or in other words those are the frame numbers on which the test originally
passed on my emulator, which may or might not be the same as to when it would
pass on a real NES.
