pcm_plugin: set the initial hw_ptr/appl_ptr from the child pcm
pcm_plugin: set the initial hw_ptr/appl_ptr from the child pcm

The direct plugins (dmix & etc.) sets own initial
hw_ptr and appl_ptr. Use this initial settings
to export correct values in snd_pcm_status().

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

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