From ba7b59ca12e0fe442f0816d81bd9ccfa992f4f2b Mon Sep 17 00:00:00 2001
From: Vladimir Vukicevic <vladimir@pobox.com>
Date: Wed, 1 Oct 2008 02:03:32 -0400
Subject: [PATCH] Fix crash with transparent windows caused by bug 418454
 r=robarnold

---
 widget/src/windows/nsWindow.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/widget/src/windows/nsWindow.cpp b/widget/src/windows/nsWindow.cpp
index 9f2f085a270..9bfee0e4ddf 100644
--- a/widget/src/windows/nsWindow.cpp
+++ b/widget/src/windows/nsWindow.cpp
@@ -5865,6 +5865,8 @@ PRBool nsWindow::OnPaint(HDC aDC)
 #ifdef MOZ_XUL
       nsRefPtr<gfxASurface> targetSurface;
       if (eTransparencyTransparent == mTransparencyMode) {
+        if (mTransparentSurface == nsnull)
+          SetupTranslucentWindowMemoryBitmap(mTransparencyMode);
         targetSurface = mTransparentSurface;
       } else {
         targetSurface = new gfxWindowsSurface(hDC);