pcm: hw: do not reset tstamp_type in SND_PCM_APPEND mode

alsa-project/alsa-lib pull request #450 was opened from kgroeneveld:

When the first client of plugins such as dshare open the hw device they set a default tstamp_type in snd_pcm_direct_initialize_slave based on tstamp_type from the config file. But when subsequent clients open the same plugin the snd_pcm_hw_open_fd function clobbers this default.

Request URL : https://github.com/alsa-project/alsa-lib/pull/450 Patch URL : https://github.com/alsa-project/alsa-lib/pull/450.patch Repository URL: https://github.com/alsa-project/alsa-lib