sdp: don't leak the ghost pad
The peer is already gone when pad_removed_cb() called, so the ghost cannot be removed. Use g_object_set_data() instead to remember the ghost pad.
Copied from similar code in GstRTPBin.
The peer is already gone when pad_removed_cb() called, so the ghost cannot be removed. Use g_object_set_data() instead to remember the ghost pad.
Copied from similar code in GstRTPBin.