Gravity Wars: messed up colour palette

[smcv]

Prerequisites:

• Debian testing (Debian 12 alpha)
• Video: GNOME 43 in Wayland mode (with Mesa 22.2.0 on AMD Vega, if it matters)
• Audio: Pipewire 0.3.59, with pipewire-pulse emulating PulseAudio
• apt install gravitywars (Debian package version 1.102-35)
• Some relevant libraries:
  • libsdl1.2-compat either 1.2.58-1 (packaged in Debian experimental) or commit eba13ef (locally built)
  • libsdl2-2.0-0 version 2.24.1+dfsg-1

To reproduce:

• gravitywars
• LD_LIBRARY_PATH=.../sdl12-compat/_build ld.so /usr/games/gravitywars
• SDL_VIDEODRIVER=wayland LD_LIBRARY_PATH=.../sdl12-compat/_build ld.so /usr/games/gravitywars

Expected result: all work, except for their access to high scores not working because this use of ld.so disables setgid

Actual result: a segfault with Wayland ­— this was caused by setgid games, similar to https://github.com/libsdl-org/sdl12-compat/issues/247#issuecomment-1276887769

Actual result: with sdl12-compat, either native Wayland or X11, the colour palette is wrong. Classic SDL 1.2:

sdl12-compat:

[icculus]

Same deal about LD_LIBRARY_PATH and setgid binaries, but the colors are wrong on this game once you get past that.

[icculus]

(if you remove the setgid bit, it'll fail to write the highscore and terminate the process at the end of the first round, but that's not an sdl12-compat issue.)

[icculus]

Also broken by 9da8808c03e80a228ee66a714091249f331ebcd7.

[smcv]

Confirmed fixed as of https://github.com/libsdl-org/sdl12-compat/commit/67f8b3a85b782eefb4db90f34d5b0742ef2cb5fc (1.2.58 + 29 commits)