From cdc534310e4e29e0455f09f51d6d75d6d4ecfb99 Mon Sep 17 00:00:00 2001
From: "jband%netscape.com"
 <jband%netscape.com@18797224-902f-48f8-a5cc-f745e15eee43>
Date: Tue, 28 Mar 2000 03:57:35 +0000
Subject: [PATCH] Prepare for semantic change to nsIInterfaceInfo::GetParent
 (will set out param to null if no parent rather than return an nsresult
 error).

git-svn-id: svn://10.0.0.236/trunk@64316 18797224-902f-48f8-a5cc-f745e15eee43
---
 mozilla/xpcom/proxy/src/nsProxyEventClass.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mozilla/xpcom/proxy/src/nsProxyEventClass.cpp b/mozilla/xpcom/proxy/src/nsProxyEventClass.cpp
index f31f508d51e..1049dc05ad0 100644
--- a/mozilla/xpcom/proxy/src/nsProxyEventClass.cpp
+++ b/mozilla/xpcom/proxy/src/nsProxyEventClass.cpp
@@ -107,7 +107,8 @@ nsProxyEventClass::GetNewOrUsedClass(REFNSIID aIID)
                 nsCOMPtr<nsIInterfaceInfo> oldest = info;
                 nsCOMPtr<nsIInterfaceInfo> parent;
 
-                while(NS_SUCCEEDED(oldest->GetParent(getter_AddRefs(parent))))
+                while(NS_SUCCEEDED(oldest->GetParent(getter_AddRefs(parent)))&&
+                      parent)
                 {
                     oldest = parent;
                 }