From ee0d316e2bbe3face78c32b2816d47be62a9089b Mon Sep 17 00:00:00 2001
From: piro <piro@599a83e7-65a4-db11-8015-0010dcdd6dc2>
Date: Sun, 20 Dec 2009 17:02:40 +0000
Subject: [PATCH] =?UTF-8?q?=E3=82=BF=E3=83=96=E3=82=92=E9=96=89=E3=81=98?=
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git-svn-id: http://www.cozmixng.org/repos/piro/treestyletab/trunk@5564 599a83e7-65a4-db11-8015-0010dcdd6dc2
---
 content/treestyletab/treestyletab.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/content/treestyletab/treestyletab.js b/content/treestyletab/treestyletab.js
index 48a8f2d0..4ebb45ce 100644
--- a/content/treestyletab/treestyletab.js
+++ b/content/treestyletab/treestyletab.js
@@ -2474,7 +2474,7 @@ catch(e) {
 	shouldCloseTabSubTreeOf : function(aTab)
 	{
 		return (
-			aTab &&
+			this.hasChildTabs(aTab) &&
 			(
 				this.getTreePref('closeParentBehavior') == this.CLOSE_PARENT_BEHAVIOR_CLOSE ||
 				this.isSubtreeCollapsed(aTab)