From 5223bef5e7f2e228ad82996ef950dc28a21c3bf7 Mon Sep 17 00:00:00 2001
From: Oleg Kalachev <okalachev@gmail.com>
Date: Sat, 10 Sep 2022 01:31:38 +0300
Subject: [PATCH] Fix error when viewing messages without header in topic
 viewer

---
 clover/www/js/topics.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clover/www/js/topics.js b/clover/www/js/topics.js
index 1bb3069f..1ad13176 100644
--- a/clover/www/js/topics.js
+++ b/clover/www/js/topics.js
@@ -54,7 +54,7 @@ function viewTopic(topic) {
 		document.title = topic;
 		if (mouseDown) return;
 
-		if (msg.header.stamp) {
+		if (msg.header && msg.header.stamp) {
 			if (params.date || params.offset) {
 				let date = new Date(msg.header.stamp.secs * 1e3 + msg.header.stamp.nsecs * 1e-6);
 				if (params.date) msg.header.date = date.toISOString();