pcm: Fix memory leak at snd_pcm_new when THREAD_SAVE_API is defined

alsa-project/alsa-lib pull request #42 was opened from chunxuxiao:

The pthread_mutexattr_t object should be destroyed by calling pthread_mutexattr_destroy(), otherwise it may cause a potential memory leak due to the different implement of pthread_mutexattr_init()

Signed-off-by: chunxu.li chunxuxiao@gmail.com

Request URL : https://github.com/alsa-project/alsa-lib/pull/42 Patch URL : https://github.com/alsa-project/alsa-lib/pull/42.patch Repository URL: https://github.com/alsa-project/alsa-lib