From e95d5a4fb9fc40d4db2b71489254cf072bf46bdc Mon Sep 17 00:00:00 2001
From: "bzbarsky%mit.edu"
 <bzbarsky%mit.edu@18797224-902f-48f8-a5cc-f745e15eee43>
Date: Wed, 23 Mar 2005 21:39:39 +0000
Subject: [PATCH] Fix some .getFromTypeAndExtension to follow the api
 documentation.  Bug 274339, r=biesi,mconnor, sr=neil

git-svn-id: svn://10.0.0.236/trunk@171131 18797224-902f-48f8-a5cc-f745e15eee43
---
 mozilla/toolkit/content/contentAreaUtils.js | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/mozilla/toolkit/content/contentAreaUtils.js b/mozilla/toolkit/content/contentAreaUtils.js
index dd2691c9dac..57063dea738 100644
--- a/mozilla/toolkit/content/contentAreaUtils.js
+++ b/mozilla/toolkit/content/contentAreaUtils.js
@@ -721,10 +721,12 @@ function getMIMETypeForURI(aURI)
 
 function getMIMEInfoForType(aMIMEType, aExtension)
 {
-  try {  
-    return getMIMEService().getFromTypeAndExtension(aMIMEType, aExtension);
-  }
-  catch (e) {
+  if (aMIMEType || aExtension) {
+    try {
+      return getMIMEService().getFromTypeAndExtension(aMIMEType, aExtension);
+    }
+    catch (e) {
+    }
   }
   return null;
 }