alsa: Add sample type assert
alsa: Add sample type assert

jodal/pyspotify,mopidy/pyspotify,kotamat/pyspotify,felix1m/pyspotify,jodal/pyspotify,jodal/pyspotify,mopidy/pyspotify,kotamat/pyspotify,felix1m/pyspotify,felix1m/pyspotify,kotamat/pyspotify