Backport of "webrtcbin: Fix pointer dereference before null check" into 1.20
requested to merge tpm/gstreamer:backport-mr-3129-into-1.20-webrtcbin_fix_dereference_before_null_check into 1.20
Backport of !3129 (merged) "webrtcbin: Fix pointer dereference before null check".
Commits:
- 93b896eb webrtcbin: Fix pointer dereference before null check