From f9a15025a59627b1ea0db6cc40809e7b9bc97b68 Mon Sep 17 00:00:00 2001
From: "cbiesinger%web.de" <cbiesinger%web.de>
Date: Thu, 11 Sep 2003 16:14:58 +0000
Subject: [PATCH] fix off-by-one error

---
 uriloader/exthandler/nsExternalHelperAppService.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/uriloader/exthandler/nsExternalHelperAppService.cpp b/uriloader/exthandler/nsExternalHelperAppService.cpp
index 53cad12b2c00..4b04fd3284f0 100644
--- a/uriloader/exthandler/nsExternalHelperAppService.cpp
+++ b/uriloader/exthandler/nsExternalHelperAppService.cpp
@@ -390,7 +390,7 @@ NS_IMETHODIMP nsExternalHelperAppService::DoContent(const char *aMimeContentType
              disp.get(), NS_ConvertUTF16toUTF8(filename).get()));
         PRInt32 pointPos = filename.RFindChar('.');
         if (pointPos != kNotFound) {
-          const nsAString & ext = Substring(filename, pointPos + 1, filename.Length() - pointPos);
+          const nsAString & ext = Substring(filename, pointPos + 1, filename.Length() - pointPos - 1);
           CopyUTF16toUTF8(ext, fileExtension);
           LOG(("...found extension '%s'\n", fileExtension.get()));
         }