From bcb3490d3ca5932c82e700bdc0443bc1243af753 Mon Sep 17 00:00:00 2001
From: Rein Klazes <wijn@wanadoo.nl>
Date: Wed, 8 Dec 2004 19:43:45 +0000
Subject: [PATCH] GetUpdateRect can be called with a NULL rect.

---
 dlls/user/painting.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/user/painting.c b/dlls/user/painting.c
index de22b6f5412..3aeee06227c 100644
--- a/dlls/user/painting.c
+++ b/dlls/user/painting.c
@@ -534,12 +534,12 @@ BOOL WINAPI GetUpdateRect( HWND hwnd, LPRECT rect, BOOL erase )
 
     if (!(update_rgn = send_ncpaint( hwnd, NULL, &flags ))) return FALSE;
 
-    GetRgnBox( update_rgn, rect );
+    if (rect) GetRgnBox( update_rgn, rect );
 
     send_erase( hwnd, flags, update_rgn, &dummy, &hdc );
     if (hdc)
     {
-        DPtoLP( hdc, (LPPOINT)rect, 2 );
+        if (rect) DPtoLP( hdc, (LPPOINT)rect, 2 );
         ReleaseDC( hwnd, hdc );
     }
     else DeleteObject( update_rgn );