From a687afbef80db576f4b927a26611edda342b323b Mon Sep 17 00:00:00 2001
From: "sspitzer%netscape.com" <sspitzer%netscape.com>
Date: Wed, 21 Mar 2001 03:39:53 +0000
Subject: [PATCH] other part of fix for #72642.  defensive programming. 
 sr=bienvenu.

---
 mailnews/local/src/nsMailboxProtocol.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mailnews/local/src/nsMailboxProtocol.cpp b/mailnews/local/src/nsMailboxProtocol.cpp
index 7adb02d09dfd..24af73416378 100644
--- a/mailnews/local/src/nsMailboxProtocol.cpp
+++ b/mailnews/local/src/nsMailboxProtocol.cpp
@@ -219,8 +219,11 @@ PRInt32 nsMailboxProtocol::DoneReadingMessage()
 		nsCOMPtr<nsIMsgDBHdr> msgHdr;
 
 		rv = m_runningUrl->GetMessageHeader(getter_AddRefs(msgHdr));
-		if (NS_SUCCEEDED(rv))
+		if (NS_SUCCEEDED(rv)) {
+            NS_ASSERTION(msgHdr, "no msg hdr!");
+            if (!msgHdr) return NS_ERROR_UNEXPECTED;
 			msgHdr->MarkRead(PR_TRUE);
+        }
 	}
 
 	return rv;