From 2f65797837ef84ab0307f04cf92bb87b1b044e51 Mon Sep 17 00:00:00 2001
From: Petr Skoda <skodak@moodle.org>
Date: Mon, 18 Oct 2010 11:39:57 +0000
Subject: [PATCH] do not send stored file if nothing to send given

---
 lib/filelib.php | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/filelib.php b/lib/filelib.php
index 7c4c8dec05e..2cfa78914d3 100644
--- a/lib/filelib.php
+++ b/lib/filelib.php
@@ -1783,6 +1783,14 @@ function send_file($path, $filename, $lifetime = 'default' , $filter=0, $pathiss
 function send_stored_file($stored_file, $lifetime=86400 , $filter=0, $forcedownload=false, $filename=null, $dontdie=false) {
     global $CFG, $COURSE, $SESSION;
 
+    if (!$stored_file or $stored_file->is_directory()) {
+        // nothing to serve
+        if ($dontdie) {
+            return;
+        }
+        die;
+    }
+
     if ($dontdie) {
         ignore_user_abort(true);
     }