From 6fe9401c397f00fd6125cbb354247002ee1bf77c Mon Sep 17 00:00:00 2001
From: Piro / YUKI Hiroshi <piro.outsider.reflex@gmail.com>
Date: Wed, 6 Mar 2013 01:51:24 +0900
Subject: [PATCH] Suppress errors while dragging the tab bar itself

---
 modules/tabbarDNDObserver.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/tabbarDNDObserver.js b/modules/tabbarDNDObserver.js
index 23d254e6..3938b875 100644
--- a/modules/tabbarDNDObserver.js
+++ b/modules/tabbarDNDObserver.js
@@ -908,7 +908,7 @@ try{
 				isVertical : (
 					b.ownerDocument.defaultView['piro.sakura.ne.jp'].tabsDragUtils.isVertical(b.tabContainer) &&
 					(
-						!draggedTab.pinned ||
+						(draggedTab && !draggedTab.pinned) ||
 						!utils.getTreePref('pinnedTab.faviconized')
 					)
 				)