From c69232269c7a65ba39cc31bf9fdbc5692cb53228 Mon Sep 17 00:00:00 2001
From: moodler <moodler>
Date: Tue, 23 Nov 2004 10:25:35 +0000
Subject: [PATCH] Robustness in function with empty input

---
 lib/moodlelib.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 040158a3a0c..6bab748b291 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -3411,6 +3411,9 @@ function raise_memory_limit ($newlimit) {
 */
 function return_bytes($val) {
    $val = trim($val);
+   if (empty($val)) {
+       return '';
+   }
    $last = $val{strlen($val)-1};
    switch($last) {
        case 'k':