transport.sendMessage: avoid passing address twice

Node already has the address, so it does not make sense to
pass it as a separate parameter.

eth/p2p/discoveryv5/protocol.nim

@@ -383,14 +383,13 @@ proc sendMessage*[T: SomeMessage](d: Protocol, toNode: Node, m: T):
     RequestId =
   doAssert(toNode.address.isSome())
   let
-    address = toNode.address.get()
     reqId = RequestId.init(d.rng[])
     message = encodeMessage(m, reqId)
 
   trace "Send message packet", dstId = toNode.id, address, kind = messageKind(T)
   discovery_message_requests_outgoing.inc()
 
-  d.transport.sendMessage(toNode, address, message)
+  d.transport.sendMessage(toNode, message)
   return reqId
 
 proc ping*(d: Protocol, toNode: Node):

eth/p2p/discoveryv5/transport.nim

@@ -68,9 +68,11 @@ proc registerRequest(t: Transport, n: Node, message: seq[byte],
       t.pendingRequests.del(nonce)
 
 ##Todo: remove dependence on message. This should be higher
-proc sendMessage*(t: Transport, toNode: Node, address: Address, message: seq[byte]) =
-  let (data, nonce) = encodeMessagePacket(t.rng[], t.codec, toNode.id,
-    address, message)
+proc sendMessage*(t: Transport, toNode: Node, message: seq[byte]) =
+  doAssert(toNode.address.isSome())
+  let address = toNode.address.get()
+  let (data, nonce) = encodeMessagePacket(t.rng[], t.codec,
+    toNode.id, address, message)
 
   t.registerRequest(toNode, message, nonce)
   t.send(toNode, data)