pcm: another fix for the snd_pcm_area_silence() fast path
pcm: another fix for the snd_pcm_area_silence() fast path

The 64-bit fast path can be used only in limited conditions:

- destination must be aligned to 64-bit (CPU aligned access)
- step must be equal to width
- physical with must be different than 24 (cannot be multiplied to 64)

Signed-off-by: Jaroslav Kysela <72edd5e1a572f82f059ccbb83c92b74d6cb051ff@perex.cz>

takaswie/alsa-lib,alsa-project/alsa-lib,takaswie/alsa-lib,tiwai/alsa-lib,takaswie/alsa-lib,tiwai/alsa-lib,alsa-project/alsa-lib,alsa-project/alsa-lib,tiwai/alsa-lib,tiwai/alsa-lib,alsa-project/alsa-lib,takaswie/alsa-lib,takaswie/alsa-lib