Block hash download fix.

libethereum/EthereumHost.cpp

@@ -74,12 +74,19 @@ void EthereumHost::noteHavePeerState(EthereumPeer* _who)
 {
 	clog(NetAllDetail) << "Have peer state.";
 
+	// TODO: FIX: BUG: Better state management!
+
 	// if already downloading hash-chain, ignore.
 	if (m_grabbing != Grabbing::Nothing)
 	{
-		clog(NetAllDetail) << "Already downloading chain. Just set to help out.";
-		_who->ensureGettingChain();
-		return;
+		for (auto const& i: peers())
+			if (i->cap<EthereumPeer>()->m_grabbing == m_grabbing || m_grabbing == Grabbing::State)
+			{
+				clog(NetAllDetail) << "Already downloading chain. Just set to help out.";
+				_who->ensureGettingChain();
+				return;
+			}
+		m_grabbing = Grabbing::Nothing;
 	}
 
 	// otherwise check to see if we should be downloading...

libwhisper/WhisperPeer.cpp

@@ -92,15 +92,17 @@ void WhisperPeer::sendMessages()
 		n++;
 	}
 
-	// pause before sending if no messages to send
-	if (!n)
+	if (n)
+	{
+		RLPStream s;
+		prep(s);
+		s.appendList(n + 1) << MessagesPacket;
+		s.appendRaw(amalg.out(), n);
+		sealAndSend(s);
+	}
+	else
+		// just pause if no messages to send
 		this_thread::sleep_for(chrono::milliseconds(100));
-
-	RLPStream s;
-	prep(s);
-	s.appendList(n + 1) << MessagesPacket;
-	s.appendRaw(amalg.out(), n);
-	sealAndSend(s);
 }
 
 void WhisperPeer::noteNewMessage(h256 _h, Message const& _m)