From e41905a55a9cbe3d5ad829be3386569cf3301bed Mon Sep 17 00:00:00 2001
From: Shian-Yow Wu <swu@mozilla.com>
Date: Thu, 4 Sep 2014 19:55:00 +0200
Subject: [PATCH] Bug 1057855 - Fix error checking when calling
 nsZipArchive::GetItem(). r=smaug

---
 content/base/src/nsXMLHttpRequest.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/content/base/src/nsXMLHttpRequest.cpp b/content/base/src/nsXMLHttpRequest.cpp
index 0791da2b7076..2168f62af3f1 100644
--- a/content/base/src/nsXMLHttpRequest.cpp
+++ b/content/base/src/nsXMLHttpRequest.cpp
@@ -4074,8 +4074,8 @@ ArrayBufferBuilder::mapToFileInPackage(const nsCString& aFile,
     return rv;
   }
   nsZipItem* zipItem = zip->GetItem(aFile.get());
-  if (NS_FAILED(rv)) {
-    return rv;
+  if (!zipItem) {
+    return NS_ERROR_FILE_TARGET_DOES_NOT_EXIST;
   }
 
   // If file was added to the package as stored(uncompressed), map to the