CI failure on haiku: '%s' directive argument is null (render_driver)

[smcv]

/__w/SDL/SDL/src/video/SDL_video.c: In function 'SDL_CreateWindowTexture':
/__w/SDL/SDL/src/video/SDL_video.c:363:36: error: '%s' directive argument is null [-Werror=format-overflow=]
  363 |         SDL_Log("render_driver == '%s'", render_driver);
      |                                    ^~
cc1: all warnings being treated as errors

If Haiku is not a release blocker for 3.2.0 (is it? it's a BeOS derivative, which seems pretty obscure), then this CI job should probably be taken off the critical path.

[smcv]

Hopefully b775135 has fixed this.

[slouken]

Haiku is our canary build to catch silly mistakes like this. :)