From 70f15f434f4c2edd7524dc891f63fa493b8184a6 Mon Sep 17 00:00:00 2001
From: "Owain G. Ainsworth" <oga@conformal.com>
Date: Wed, 2 Oct 2013 20:18:13 +0100
Subject: [PATCH] Return nil in GetAddress if no addresses present.

Honestly thought we already did this, but turns out no.
---
 addrmanager.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/addrmanager.go b/addrmanager.go
index a4da1b83..25eed9a8 100644
--- a/addrmanager.go
+++ b/addrmanager.go
@@ -764,6 +764,10 @@ func NetAddressKey(na *btcwire.NetAddress) string {
 // have not been used recently and should not pick 'close' addresses
 // consecutively.
 func (a *AddrManager) GetAddress(class string, newBias int) *knownAddress {
+	if a.NumAddresses() == 0 {
+		return nil
+	}
+
 	// Protect concurrent access.
 	a.mtx.Lock()
 	defer a.mtx.Unlock()