Cxbx-reloaded: Handle demo(?) title IDs

[Margen67]

Quick summary

Demos, and possibly other software, incorrectly produce a serial with more than 3 digits.

Details

It's 32768 or more because the value is 8### in hex, which might indicate it being a demo or something.
If you remove the 8 it becomes a normal number.

System Configuration:

N/A

Additional Information (if any):

Still occurs as of https://github.com/Cxbx-Reloaded/Cxbx-Reloaded/commit/4d0671248982b5975b6097f46f180de956f33a87

List of games with weird title IDs

Discord discussion

Relevant code

[github-actions[bot]]

@Margen67: your issue has been automatically closed because it does not follow the issue template.

[PatrickvL]

Sorry for reopen & close, but I overlooked that it's better to follow the issue template. So, closing doesn't mean it's an invalid issue, it's just to try and bring some order into things.

Please, create a new issue and follow the template, or apply the template (which can be gotten from a temporary new issue that you won't save) to this issue, so that we can reopen it for real.

Good call btw, on documenting this title id issue. Many such things, little or large, should be tracked via issues more often...

[Margen67]

@PatrickvL Fixed.