From a267c40f5b2f121757c8fb3afb44206584e40ee4 Mon Sep 17 00:00:00 2001
From: Christoph von Wittich <christoph_vw@reactos.org>
Date: Sat, 12 Jul 2008 13:47:06 +0000
Subject: [PATCH] don't deref NULL pointer

svn path=/trunk/; revision=34439
---
 reactos/subsystems/win32/win32k/ntuser/window.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/reactos/subsystems/win32/win32k/ntuser/window.c b/reactos/subsystems/win32/win32k/ntuser/window.c
index ab285aa5cd5..7f4f55ab834 100644
--- a/reactos/subsystems/win32/win32k/ntuser/window.c
+++ b/reactos/subsystems/win32/win32k/ntuser/window.c
@@ -1149,7 +1149,8 @@ IntUnlinkWindow(PWINDOW_OBJECT Wnd)
       WndParent->FirstChild = Wnd->NextSibling;
 
    Wnd->PrevSibling = Wnd->NextSibling = Wnd->Parent = NULL;
-   Wnd->Wnd->Parent = NULL;
+   if (Wnd->Wnd)
+       Wnd->Wnd->Parent = NULL;
 }
 
 BOOL FASTCALL