diff options
| -rw-r--r-- | scripts/rhizicore.js | 4 |
1 files changed, 3 insertions, 1 deletions
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; |