From 13e6e746807cca9687f29bacde886e939a499865 Mon Sep 17 00:00:00 2001
From: Miek Gieben <miek@miek.nl>
Date: Thu, 7 Oct 2010 08:45:21 +0200
Subject: [PATCH] Fix printing of the header
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Patch from Stéphane Bortzmeyer
---
 dnsmsg.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dnsmsg.go b/dnsmsg.go
index 99369c5c..dd7fdeb3 100644
--- a/dnsmsg.go
+++ b/dnsmsg.go
@@ -480,6 +480,10 @@ type MsgHdr struct {
 //;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48404
 //;; flags: qr aa rd ra;
 func (h *MsgHdr) String() string {
+	if h == nil {
+		return "<nil> MsgHdr"
+	}
+
 	s := ";; ->>HEADER<<- opcode: " + opcode_str[h.opcode]
 	s += ", status: " + rcode_str[h.rcode]
 	s += ", id: " + strconv.Itoa(int(h.id)) + "\n"