From 8c3c3f66b636681053d79b1fad1db5c745134f41 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Wang?= <fred.wang@free.fr>
Date: Mon, 9 Sep 2013 09:58:18 +0200
Subject: [PATCH] Fix Javascript error in MathEvent.js. #562

---
 unpacked/extensions/MathEvents.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/unpacked/extensions/MathEvents.js b/unpacked/extensions/MathEvents.js
index 0b16a229a..39ce0f565 100644
--- a/unpacked/extensions/MathEvents.js
+++ b/unpacked/extensions/MathEvents.js
@@ -171,7 +171,7 @@
           annotationList = MathJax.Hub.Config.semanticsAnnotations;
           for (var i = 0, m = annotationItems.length; i < m; i++) {
             var name = annotationItems[i].name[1]
-            if (jax.root.getAnnotation(name) !== null) {
+            if (jax.root && jax.root.getAnnotation(name) !== null) {
               annotations.disabled = false;
               annotationItems[i].hidden = false;
             } else {