atari:video:gem refactor & small bugfixes

[sezero]

Thanks

[icculus]

(Can we please get the SDL 1.2 atari people write access? It seems silly for them to have to go through the PR process for platform-specific magic we don't understand, in code we're not actively maintaining, that they're clearly passionate about.)

[slouken]

(Can we please get the SDL 1.2 atari people write access? It seems silly for them to have to go through the PR process for platform-specific magic we don't understand, in code we're not actively maintaining, that they're clearly passionate about.)

Yes!

[icculus]

@mikrosk I'm adding you and @pmandin to this repository with write access. Check for GitHub invites in your inbox. If you are working on Atari stuff, don't make a PR, just push commits (if you're doing something significant that isn't Atari stuff, please do make a PR, though, so we can look at it).

If there are other people in the community that should have write access, let me know.

[mikrosk]

If you are working on Atari stuff, don't make a PR, just push commits (if you're doing something significant that isn't Atari stuff, please do make a PR, though, so we can look at it).

Thanks guys, I follow the same policy in other projects as well (ScummVM for instance).