From 8b7300530901fb59623d28778dd588f54165ea98 Mon Sep 17 00:00:00 2001
From: "darin%meer.net" <darin%meer.net>
Date: Thu, 18 Aug 2005 11:16:55 +0000
Subject: [PATCH] fixes bug 262183 "FFTrunk and Trunk crash [@
 nsSHEntry::GetChildAt]" r=biesi sr=bzbarsky

---
 docshell/shistory/src/nsSHEntry.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/docshell/shistory/src/nsSHEntry.cpp b/docshell/shistory/src/nsSHEntry.cpp
index c6a1eb0e2555..572de0904284 100644
--- a/docshell/shistory/src/nsSHEntry.cpp
+++ b/docshell/shistory/src/nsSHEntry.cpp
@@ -393,7 +393,9 @@ nsSHEntry::GetChildAt(PRInt32 aIndex, nsISHEntry ** aResult)
 {
   if (aIndex >= 0 && aIndex < mChildren.Count()) {
     *aResult = mChildren[aIndex];
-    NS_ADDREF(*aResult);
+    // yes, mChildren can have holes in it.  AddChild's offset parameter makes
+    // that possible.
+    NS_IF_ADDREF(*aResult);
   } else {
     *aResult = nsnull;
   }