From 681405debccb04f6993738ce2d684e6341484b19 Mon Sep 17 00:00:00 2001
From: "Davide P. Cervone" <dpvc@union.edu>
Date: Wed, 29 May 2013 11:56:41 -0400
Subject: [PATCH] Avoid accessing data[0] when not defined.  Resolves issue
 #486.

---
 unpacked/jax/output/NativeMML/config.js | 2 +-
 unpacked/jax/output/NativeMML/jax.js    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/unpacked/jax/output/NativeMML/config.js b/unpacked/jax/output/NativeMML/config.js
index ce33a8918..6160f35c4 100644
--- a/unpacked/jax/output/NativeMML/config.js
+++ b/unpacked/jax/output/NativeMML/config.js
@@ -27,7 +27,7 @@
 
 MathJax.OutputJax.NativeMML = MathJax.OutputJax({
   id: "NativeMML",
-  version: "2.2",
+  version: "2.2.1",
   directory: MathJax.OutputJax.directory + "/NativeMML",
   extensionDir: MathJax.OutputJax.extensionDir + "/NativeMML",
   
diff --git a/unpacked/jax/output/NativeMML/jax.js b/unpacked/jax/output/NativeMML/jax.js
index 5e866301e..dadf3d434 100644
--- a/unpacked/jax/output/NativeMML/jax.js
+++ b/unpacked/jax/output/NativeMML/jax.js
@@ -576,7 +576,7 @@
 	if (this.data[this.sub] == null) {type = "msup"}
 	var tag = this.NativeMMLelement(type);
 	this.NativeMMLattributes(tag);
-	delete this.data[0].inferred;
+	if (this.data[0]) {delete this.data[0].inferred}
 	for (var i = 0, m = this.data.length; i < m; i++)
 	  {if (this.data[i]) {this.data[i].toNativeMML(tag)}}
 	parent.appendChild(tag);