* @param t Tunnel on which this message is transmitted.
* @param cont Continuation to call once message is really sent.
* @param cont_cls Closure for @c cont.
- * @return Handle to cancel message. NULL if @c cont is NULL.
+ * @return Handle to cancel message.
*/
struct CadetTunnelQueueEntry *
GCT_send (struct CadetTunnel *t,