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!main
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a40405d724
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d4a01bfef0
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@ -56,13 +56,13 @@ SDL_CreateMutex(void)
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void
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SDL_DestroyMutex(SDL_mutex * mutex)
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{
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ULONG ulRC;
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HMTX hMtx = (HMTX)mutex;
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ulRC = DosCloseMutexSem(hMtx);
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if (hMtx != NULLHANDLE) {
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const ULONG ulRC = DosCloseMutexSem(hMtx);
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if (ulRC != NO_ERROR) {
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debug_os2("DosCloseMutexSem(), rc = %u", ulRC);
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}
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}
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}
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/* Lock the mutex */
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