PeerManager: buffer onion messages only if forwarding OMs is supported

Author: valentinewallace

lightning/src/ln/peer_handler.rs

@@ -776,7 +776,9 @@ impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, OM: Deref, L: Deref, CM
 
 	fn do_attempt_write_data(&self, descriptor: &mut Descriptor, peer: &mut Peer) {
 		while !peer.awaiting_write_event {
-			if peer.should_buffer_onion_message() {
+			if self.message_handler.onion_message_handler.supports_onion_message_forwarding() &&
+				peer.should_buffer_onion_message()
+			{
 				if let Some(peer_node_id) = peer.their_node_id {
 					if let Some(next_onion_message) =
 						self.message_handler.onion_message_handler.next_onion_message_for_peer(peer_node_id) {