From 0dc4496ea8abb979767867285b1a399b2fba7665 Mon Sep 17 00:00:00 2001
From: James Tabor <james.tabor@reactos.org>
Date: Mon, 5 Nov 2007 02:25:43 +0000
Subject: [PATCH] Allow batch flush to handle null DCs.

svn path=/trunk/; revision=30145
---
 reactos/subsystems/win32/win32k/objects/gdibatch.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/reactos/subsystems/win32/win32k/objects/gdibatch.c b/reactos/subsystems/win32/win32k/objects/gdibatch.c
index 08f664f9fa5..c6261508d73 100644
--- a/reactos/subsystems/win32/win32k/objects/gdibatch.c
+++ b/reactos/subsystems/win32/win32k/objects/gdibatch.c
@@ -18,9 +18,9 @@ ULONG
 FASTCALL
 GdiFlushUserBatch(HDC hDC, PGDIBATCHHDR pHdr)
 {
-  PDC dc = DC_LockDc(hDC);
-  if (!dc) return 0;
-  // The thread is on the end of sunset.
+  PDC dc = NULL;
+  if (hDC) dc = DC_LockDc(hDC);
+  // The thread is approaching the end of sunset.
   switch(pHdr->Cmd)
   {
      case GdiBCPatBlt: // Highest pri first!
@@ -33,6 +33,7 @@ GdiFlushUserBatch(HDC hDC, PGDIBATCHHDR pHdr)
         break;
      case GdiBCSetBrushOrg:
      {
+        if (!dc) break;
         PGDIBSSETBRHORG pgSBO = (PGDIBSSETBRHORG) pHdr;
         dc->Dc_Attr.ptlBrushOrigin = pgSBO->ptlBrushOrigin;
         break;
@@ -49,10 +50,9 @@ GdiFlushUserBatch(HDC hDC, PGDIBATCHHDR pHdr)
         break;
      }
      default:
-       DC_UnlockDc(dc);
-       return 0;
+        break;
   }
-  DC_UnlockDc(dc);
+  if (dc) DC_UnlockDc(dc);
   return pHdr->Size; // Return the full size of the structure.
 }