aplay: change if statement to else if in xrun function

[GitHub pull_request - opened]

alsa-project/alsa-utils pull request #50 was opened from JSFamily:



Request URL   : https://github.com/alsa-project/alsa-utils/pull/50
Patch URL     : https://github.com/alsa-project/alsa-utils/pull/50.patch
Repository URL: https://github.com/alsa-project/alsa-utils