- Unfortunately, the way this system previously worked, the unlock was given to you for free if you accidentially opened two copies of the game at once.
- Instead, open the file in r+ mode, shimmy along 5 bytes, and write a `true` to be read later.
- Far more memory safe than rewriting the entire gamedata out on crash.
ALSO:
- crashflags has been split into boolean evercrashed and UINT8 musicflags.
- We don't need to track if the LAST session was a crash, at least not right now.
- Opens the floor up to other music like Loser Club happening on the Challenges menu.
- Combine multiple adjacent saves
- Generally could happen during game ticking, combined via gamedata->deferredstate
- DEFINITELY happened in splitscreen PWR handling, adjust those loops directly
- Write "dirty" state via gamedata->crashflags on everything except safe, intentful unloads
- Add UC_CRASH, which unlocks dependent on the above "dirty" state being present at gamedata load
- We can use this for something more useful and less funny later.
- Play "O_LOSERC" on the menu, starting with the Challenges screen, if a UC_CRASH condition has been met.
- Default to 1, which means potential for a 1-frame loss every once in a while but no longer a complete cpu hog
- New minimum is 0, since -1 just did the exact same thing as 0.
