From be4bb69ef8982b04b130663a8823cb37b0c0e5f5 Mon Sep 17 00:00:00 2001
From: Timo Kreuzer <timo.kreuzer@reactos.org>
Date: Wed, 20 Apr 2011 21:10:13 +0000
Subject: [PATCH] [WIN32K] Don't try to lock a dcs clip region if its NULL

svn path=/trunk/; revision=51411
---
 reactos/subsystems/win32/win32k/objects/cliprgn.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/reactos/subsystems/win32/win32k/objects/cliprgn.c b/reactos/subsystems/win32/win32k/objects/cliprgn.c
index 7294f2b31fd..bfe5248d10e 100644
--- a/reactos/subsystems/win32/win32k/objects/cliprgn.c
+++ b/reactos/subsystems/win32/win32k/objects/cliprgn.c
@@ -192,7 +192,7 @@ GdiGetClipBox(HDC hDC, PRECTL rc)
    {
       pRgn = dc->dclevel.prgnMeta;
    }
-   else
+   else if (dc->rosdc.hClipRgn)
    {
 	   Unlock = TRUE ;
        pRgn = REGION_LockRgn(dc->rosdc.hClipRgn); // CLIPRGN