tlv: ignore xdir when type is DB_MINMAX_MUTE

alsa-project/alsa-lib pull request #474 was opened from qaqland:

Muting caused by rounding is meaningless, and it is also inconvenient for upper-layer applications to handling muting issues caused by DB_MINMAX_MUTE or xdir. Thus, the restriction on xdir is removed.

Request URL : https://github.com/alsa-project/alsa-lib/pull/474 Patch URL : https://github.com/alsa-project/alsa-lib/pull/474.patch Repository URL: https://github.com/alsa-project/alsa-lib