Fix error on datagram ack.
@@ -674,7 +674,7 @@ int mediatest_callback(picoquic_cnx_t* cnx,
ret = mediatest_handle_datagram_ack_nack(cnx_ctx, fin_or_event, stream_id /* encodes the send time!*/,
bytes, length, picoquic_get_quic_time(cnx_ctx->mt_ctx->quic));
#else
- ret = -1;
+ ret = 0;
#endif
break;
case picoquic_callback_pacing_changed:
