From 580bc10d6973c796b254c6db72f8778cdfd94d94 Mon Sep 17 00:00:00 2001
From: "L. David Baron" <dbaron@dbaron.org>
Date: Sat, 18 Sep 2010 11:43:17 -0700
Subject: [PATCH] Bug 597676. If there's no rootPresContext, we should never
 detect DOM modification. Makes printing paint again. r=dbaron
 a=blocking2.0:beta7

---
 layout/base/FrameLayerBuilder.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/layout/base/FrameLayerBuilder.cpp b/layout/base/FrameLayerBuilder.cpp
index 4b7f960768a6..82c58960445d 100644
--- a/layout/base/FrameLayerBuilder.cpp
+++ b/layout/base/FrameLayerBuilder.cpp
@@ -1696,7 +1696,7 @@ FrameLayerBuilder::DrawThebesLayer(ThebesLayer* aLayer,
 PRBool
 FrameLayerBuilder::CheckDOMModified()
 {
-  if (mRootPresContext &&
+  if (!mRootPresContext ||
       mInitialDOMGeneration == mRootPresContext->GetDOMGeneration())
     return PR_FALSE;
   if (mDetectedDOMModification) {