From 0875f6d9c5e2c8acd719ff71cca2da39f9df0753 Mon Sep 17 00:00:00 2001
From: junfengye <junfeng.yejf@gmail.com>
Date: Sat, 7 Jun 2014 12:55:09 +0800
Subject: [PATCH] logic error for hiddenColumns._syncOrder ?

error happens when j == cols.length - 1 and cols[j].hidden = true
---
 modules/HiddenColumns.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/modules/HiddenColumns.js b/modules/HiddenColumns.js
index be6c6eb5e..06f92640c 100644
--- a/modules/HiddenColumns.js
+++ b/modules/HiddenColumns.js
@@ -278,10 +278,10 @@ define([
 			//Sort the cached columns to have the same order as g._columns.
 			for(; i < columns.length && j < cols.length; ++i, ++j){
 				//j must not overflow here because t._cols and g._columns are synced up.
-				for(c = cols[j]; c.hidden; c = cols[j]){
+				for(c = cols[j]; c && c.hidden; c = cols[j]){
 					++j;
 				}
-				if(columns[i] != c){
+				if(c && columns[i] != c){
 					k = array.indexOf(cols, columns[i]);
 					cols[j] = cols[k];
 					cols[k] = c;