From 97911d7b7aabbb954ec843c7d5f3bb9bb9fd903c Mon Sep 17 00:00:00 2001
From: Pavel Machek <pavel@ucw.cz>
Date: Wed, 11 Dec 2024 23:52:25 +0100
Subject: [PATCH] spacer: fix exception when sys is undefined

---
 apps/spacer/spacer.app.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/spacer/spacer.app.js b/apps/spacer/spacer.app.js
index 4bedaa598..13812b2a5 100644
--- a/apps/spacer/spacer.app.js
+++ b/apps/spacer/spacer.app.js
@@ -197,7 +197,7 @@ let sky = {
   msg: {},
   tof: function(v) { let i = (1*v); return i.toFixed(0); },
   fmtSys: function(sys) {
-    if (sys.sent !== undefined && sys.d23 !== undefined)
+    if (sys && sys.sent !== undefined && sys.d23 !== undefined)
       return sys.sent + "." + sys.d23 + "D "+ this.tof(sys.pdop) + " " + this.tof(sys.vdop) + "\n";
     else
       return "(no data)\n";