From 119d8d8d2898c2b9efbed56388fd236b5de7d601 Mon Sep 17 00:00:00 2001
From: Christoph von Wittich <christoph_vw@reactos.org>
Date: Fri, 23 Nov 2007 07:33:54 +0000
Subject: [PATCH] don't try to alphablend monochrome bitmaps - fixes the red
 zone overwrite in opera 9.24

svn path=/trunk/; revision=30687
---
 reactos/subsystems/win32/win32k/ntuser/cursoricon.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/reactos/subsystems/win32/win32k/ntuser/cursoricon.c b/reactos/subsystems/win32/win32k/ntuser/cursoricon.c
index 40f64a97218..1460c0d85b2 100644
--- a/reactos/subsystems/win32/win32k/ntuser/cursoricon.c
+++ b/reactos/subsystems/win32/win32k/ntuser/cursoricon.c
@@ -1400,7 +1400,10 @@ UserDrawIconEx(
       IconSize.cy = bmpMask.bmHeight / 2;
    }
 
-   if (bmpColor.bmBitsPixel == 32)
+   /* NtGdiCreateCompatibleBitmap will create a monochrome bitmap
+      when cxWidth or cyHeight is 0
+   */
+   if ((bmpColor.bmBitsPixel == 32) && (cxWidth != 0) && (cyHeight != 0))
    {
       bAlpha = TRUE;
    }