From ed67c2c97b1ffda31f1404a2916f1f889bbfadac Mon Sep 17 00:00:00 2001
From: Pavel Reznikov <pashka.reznikov@gmail.com>
Date: Sun, 1 Mar 2015 22:20:34 -0800
Subject: [PATCH] update gridstack

---
 gridstack.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gridstack.js b/gridstack.js
index a5caa88..7a95818 100644
--- a/gridstack.js
+++ b/gridstack.js
@@ -368,7 +368,8 @@
 
         this.container.addClass(this.opts._class);
         this._styles = Utils.create_stylesheet();
-        this._styles._max = 0;
+        if (this._styles != null)
+            this._styles._max = 0;
 
         this.grid = new GridStackEngine(this.opts.width, function (nodes) {
             var max_height = 0;
@@ -449,6 +450,10 @@
     };
 
     GridStack.prototype._update_styles = function (max_height) {
+        if (this._styles == null) {
+            return;
+        }
+
         var prefix = '.' + this.opts._class + ' .' + this.opts.item_class;
 
         if (typeof max_height == 'undefined') {