From 20253a4208fb64f6e0a56c9a3b4c981e10b0c4a5 Mon Sep 17 00:00:00 2001
From: "mcafee%netscape.com" <mcafee%netscape.com>
Date: Tue, 28 Sep 1999 01:46:58 +0000
Subject: [PATCH] Checking for null pointer. r=pavlov

---
 gfx/src/gtk/nsRenderingContextGTK.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gfx/src/gtk/nsRenderingContextGTK.cpp b/gfx/src/gtk/nsRenderingContextGTK.cpp
index 5f11b09ce846..04107096b7ae 100644
--- a/gfx/src/gtk/nsRenderingContextGTK.cpp
+++ b/gfx/src/gtk/nsRenderingContextGTK.cpp
@@ -421,6 +421,10 @@ NS_IMETHODIMP nsRenderingContextGTK::SetClipRegion(const nsIRegion& aRegion,
 {
   GdkRegion *rgn;
  
+  if(!mClipRegion) {
+    return NS_ERROR_FAILURE;
+  }
+
   switch(aCombine)
   {
     case nsClipCombine_kIntersect: