From 39980608f8af0e304df95bfb63767907b85c4a13 Mon Sep 17 00:00:00 2001
From: Dmitry Gorbachev <gorbachev@reactos.org>
Date: Sun, 16 Aug 2009 22:52:05 +0000
Subject: [PATCH] Add an assertion. See bug #4785.

svn path=/trunk/; revision=42747
---
 reactos/ntoskrnl/ps/win32.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/reactos/ntoskrnl/ps/win32.c b/reactos/ntoskrnl/ps/win32.c
index 19901dc1356..08d84402105 100644
--- a/reactos/ntoskrnl/ps/win32.c
+++ b/reactos/ntoskrnl/ps/win32.c
@@ -39,6 +39,9 @@ PsConvertToGuiThread(VOID)
     /* Validate the previous mode */
     if (KeGetPreviousMode() == KernelMode) return STATUS_INVALID_PARAMETER;
 
+    /* If no win32k, crashes later */
+    ASSERT(PspW32ProcessCallout != NULL);
+
     /* Make sure win32k is here */
     if (!PspW32ProcessCallout) return STATUS_ACCESS_DENIED;