PCM Midlevel
    This patch is against alsa-driver-1.0.8.
    It covers:
        alsa-kernel/core/pcm_lib.c
    The main changes are in the first listed file.

    It corresponds to bug description:
        <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=951>

    The patch does cosmetic change:

     -- Better, more universal and smaller wrapping to within
        0..runtime->boundary-1 in functions snd_pcm_lib_write1() and
        snd_pcm_lib_read1() in pcm_lib.c
Signed-off-by: Charles Levert <charles_levert@gna.org>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>