From 8c85dd1d2d1e5eb67662accf42986812639e463c Mon Sep 17 00:00:00 2001
From: "gavin%gavinsharp.com"
 <gavin%gavinsharp.com@18797224-902f-48f8-a5cc-f745e15eee43>
Date: Wed, 28 Sep 2005 02:52:52 +0000
Subject: [PATCH] Bug 310139: Editing mime-type handlers fails with a missing
 handler, patch by Phil Ringnalda <bugzilla@philringnalda.com>, r=mscott

git-svn-id: svn://10.0.0.236/trunk@181105 18797224-902f-48f8-a5cc-f745e15eee43
---
 mozilla/mail/components/preferences/downloadactions.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mozilla/mail/components/preferences/downloadactions.js b/mozilla/mail/components/preferences/downloadactions.js
index d4318840d24..003bc22d5f0 100644
--- a/mozilla/mail/components/preferences/downloadactions.js
+++ b/mozilla/mail/components/preferences/downloadactions.js
@@ -298,6 +298,8 @@ var gDownloadActionsWindow = {
       catch (e) {
         customHandler = null;
       }      
+      if (customHandler && !customHandler.exists())
+        customHandler = null;
       var mimeType = this._getLiteralValue(type, "value");
       var typeInfo = this._mimeSvc.getFromTypeAndExtension(mimeType, null);