Sam Lantinga 0500c04468 Fix SDL_HINT_THREAD_FORCE_REALTIME_TIME_CRITICAL also applying to HIGH priorities
As the name suggests, the hint should only apply to SDL_THREAD_PRIORITY_TIME_CRITICAL

The resulting priorities for my current distro result in these values:

     | High         | Time Critical
Hint |--------------|-----------------
 0   |  P=10 N=-10  | P=5   N=-15
 1   |  P=10 N=-10  | P=-21 N=0
2020-11-12 07:53:05 -08:00
..