dashdemux: fix gst_mpdparser_get_rep_idx_with_max_bandwidth return
Submitted by Matthieu Bouron
Link to original bug (#737293)
Description
If bandwidth <=0, gst_mpdparser_get_rep_idx_with_max_bandwidth should return -1 as no corresponding representation is found.
This makes dashdemux select the lowest representation for the first fragment.
Version: 1.4.1