Fix an infinite timeout scenario with ledger acquisition.

src/LedgerAcquire.cpp

@@ -95,6 +95,16 @@ LedgerAcquire::LedgerAcquire(const uint256& hash) : PeerSet(hash, LEDGER_ACQUIRE
 #endif
 }
 
+void LedgerAcquire::onTimer()
+{
+	if (getTimeouts() > 6)
+	{
+		setFailed();
+		done();
+	}
+	else trigger(Peer::pointer());
+}
+
 boost::weak_ptr<PeerSet> LedgerAcquire::pmDowncast()
 {
 	return boost::shared_polymorphic_downcast<PeerSet, LedgerAcquire>(shared_from_this());

src/LedgerAcquire.h

@@ -70,7 +70,7 @@ protected:
 	std::vector< boost::function<void (LedgerAcquire::pointer)> > mOnComplete;
 
 	void done();
-	void onTimer() { trigger(Peer::pointer()); }
+	void onTimer();
 
 	void newPeer(Peer::pointer peer) { trigger(peer); }