alsasrc: Don't use driver timestamp if it's zero
Submitted by Georg Lippitsch
Link to original bug (#796109)
Description
Some alsa sources (like dsnoop) have always zero in their timecode field. In that case, use gstreamer's own timestamping.
Link to original bug (#796109)
Some alsa sources (like dsnoop) have always zero in their timecode field. In that case, use gstreamer's own timestamping.