Fix SDL_TICKS_PASSED (#234)

[benrg]

PR Description

SDL_TICKS_PASSED is meant to compare 32-bit tick counts in a way that works correctly when the counter has recently wrapped around. The Python implementation just did a straight integer comparison. Fix it and add a regression test.

Merge Checklist

• [x] the PR has been reviewed and all comments are resolved
• [ ] all CI checks pass
• [ ] (if applicable): the PR description includes the phrase closes #<issue-number> to automatically close an issue
• [ ] (if applicable): bug fixes, new features, or API changes are documented in news.rst

[a-hurst]

@benrg Thanks so much for this! Not sure why a few of the the CI tests are failing/segfaulting since this doesn't change anything ctypes-related. I'll take a quick look, but since it doesn't seem likely the fix here is the culprit I'll probably just merge this and try to figure it out later.

[a-hurst]

@benrg Sorry for the delay! Real life and work have been getting in the way of side-projects this month. From what I can tell the segfaults are being caused elsewhere and are just exacerbated somehow by the added test. Since your code isn't at fault I'm just going to merge and sort it out from there. Thanks again for the fix!