From 68811d1d7ff93e8e0488c611dbce795d354f2caa Mon Sep 17 00:00:00 2001
From: Alexander Surkov <surkov.alexander@gmail.com>
Date: Mon, 30 Nov 2009 13:59:09 +0800
Subject: [PATCH] Bug 528311 - Crash [@
 nsXULTreeAccessible::GetTreeItemAccessible(int, nsIAccessible**) ], part2,
 r=marcoz, b192=beltzner

---
 accessible/src/xul/nsXULTreeAccessible.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/accessible/src/xul/nsXULTreeAccessible.cpp b/accessible/src/xul/nsXULTreeAccessible.cpp
index 1a0ce0ea225b..b5467bc8f659 100644
--- a/accessible/src/xul/nsXULTreeAccessible.cpp
+++ b/accessible/src/xul/nsXULTreeAccessible.cpp
@@ -544,7 +544,7 @@ nsXULTreeAccessible::GetTreeItemAccessible(PRInt32 aRow,
 {
   *aAccessible = nsnull;
 
-  if (aRow < 0)
+  if (aRow < 0 || IsDefunct())
     return;
 
   PRInt32 rowCount = 0;