From 9c4389def2b060ef57c1b6a6a214c68d2c2d7a5d Mon Sep 17 00:00:00 2001
From: "saari%netscape.com" <saari%netscape.com>
Date: Thu, 1 Jul 1999 20:57:28 +0000
Subject: [PATCH] Error checking on QI call prevents crash with multiple DOM
 nodes of the same ID

---
 rdf/content/src/nsXULKeyListener.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rdf/content/src/nsXULKeyListener.cpp b/rdf/content/src/nsXULKeyListener.cpp
index 289eea146426..99c1c50fa040 100644
--- a/rdf/content/src/nsXULKeyListener.cpp
+++ b/rdf/content/src/nsXULKeyListener.cpp
@@ -219,6 +219,9 @@ nsresult nsXULKeyListenerImpl::KeyPress(nsIDOMEvent* aKeyEvent)
   while (keysetNode) {
      nsString keysetNodeType;
      nsCOMPtr<nsIDOMElement> keysetElement(do_QueryInterface(keysetNode));
+     if(!keysetElement)
+       return rv;
+       
      keysetElement->GetNodeName(keysetNodeType);
 	 if (keysetNodeType.Equals("keyset")) {
 	  // Given the DOM node and Key Event