arcam_av.c: Include missing string.h

alsa-project/alsa-plugins pull request #47 was opened from kraj:

bzero() function needs this header to be included

Signed-off-by: Khem Raj raj.khem@gmail.com

Request URL : https://github.com/alsa-project/alsa-plugins/pull/47 Patch URL : https://github.com/alsa-project/alsa-plugins/pull/47.patch Repository URL: https://github.com/alsa-project/alsa-plugins