aplay: Fix typo in error message

alsa-project/alsa-utils pull request #44 was opened from trebmuh:

replace #43

Request URL : https://github.com/alsa-project/alsa-utils/pull/44 Patch URL : https://github.com/alsa-project/alsa-utils/pull/44.patch Repository URL: https://github.com/alsa-project/alsa-utils