Commit d4a01bfef0da5b80ca25f0962b02cefacc283476
2022-04-20T14:07:30
os2: SDL_DestroyMutex should ignore NULL mutexes. Every other backend does this, so this should match, now. It's possible this was harmless, but we can avoid the system call and the (likely?) debug message when it fails, though!