[opw-web] Fix caching by including PEAR.php

[Owen Taylor <otaylor src gnome org>]

commit 184431a5c1c8c9d92b24e62be8d026c5d4c2e6f4
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Sun Mar 9 12:45:03 2014 -0400

    Fix caching by including PEAR.php

 classes/class_cache.php |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/classes/class_cache.php b/classes/class_cache.php
index bab61e6..fe4a3c5 100644
--- a/classes/class_cache.php
+++ b/classes/class_cache.php
@@ -5,6 +5,8 @@
 * @copyright (c) 2012 KDE. All rights reserved.
 */
 
+include_once('PEAR.php');
+
 class cache
 {
     // Global vars