bat: really skip analysis of the first period and update related comment

alsa-project/alsa-utils pull request #237 was opened from dbrignoli:

Prior to this change bat/analyze.c would skip the last period of the recording, contrary to what the comment in the code which stated the first period was meant to be skipped.

The comment has been updated to state that both the first and last period are skipped and the code has been updated to match.

Request URL : https://github.com/alsa-project/alsa-utils/pull/237 Patch URL : https://github.com/alsa-project/alsa-utils/pull/237.patch Repository URL: https://github.com/alsa-project/alsa-utils