From 9c5c81eba23196bc0832a92ffffec4e1af1d6293 Mon Sep 17 00:00:00 2001
From: Christoph von Wittich <christoph_vw@reactos.org>
Date: Thu, 10 Jul 2008 14:00:50 +0000
Subject: [PATCH] don't deref NULL pointer

svn path=/trunk/; revision=34412
---
 reactos/subsystems/win32/win32k/ntuser/winpos.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/reactos/subsystems/win32/win32k/ntuser/winpos.c b/reactos/subsystems/win32/win32k/ntuser/winpos.c
index 0a41768db5d..aa3e0d812f1 100644
--- a/reactos/subsystems/win32/win32k/ntuser/winpos.c
+++ b/reactos/subsystems/win32/win32k/ntuser/winpos.c
@@ -117,6 +117,7 @@ BOOL FASTCALL can_activate_window( PWINDOW_OBJECT Wnd OPTIONAL)
     LONG style;
 
     if (!Wnd) return FALSE;
+	if (!Wnd->Wnd) return FALSE;
     style = Wnd->Wnd->Style;
     if (!(style & WS_VISIBLE) &&
         Wnd->OwnerThread->ThreadsProcess != CsrProcess) return FALSE;