From 86cc69957612248f0991eae7d5fac3a760b06eb2 Mon Sep 17 00:00:00 2001
From: Alon Levy <alon@pobox.com>
Date: Tue, 19 Aug 2014 17:44:44 +0300
Subject: rhizicore: history: fix dereference of undefined

---
 scripts/rhizicore.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/rhizicore.js b/scripts/rhizicore.js
index 7c9ed274..715c8475 100644
--- a/scripts/rhizicore.js
+++ b/scripts/rhizicore.js
@@ -467,7 +467,9 @@ function myGraph(el) {
     this.set_user = set_user;
 
     function clear_history() {
-        this.history.clear();
+        if (this.history !== undefined) {
+            this.history.clear();
+        }
     }
     this.clear_history = clear_history;
 
-- 
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