Backport of "rtp: opuspay: fix memory leak in gst_rtp_opus_pay_setcaps." into 1.16
Backport of !271 (merged) "rtp: opuspay: fix memory leak in gst_rtp_opus_pay_setcaps.".
Commits:
- dbd72341 rtp: opuspay: fix memory leak in gst_rtp_opus_pay_setcaps.