Git commits in Moodle 2.4.8 by Jean-Philippe Gaudreau

commit 19ef0167784ef1e5ca4e2bd5f1b02dd12510b2c1
Author: Jean-Philippe Gaudreau <jp.gaudreau@umontreal.ca>
Date:   Thu, 12 Dec 2013 00:10:38 +0800
Tag:    v2.4.8

MDL-41246 cache: Fix PHP notice of non well formed numeric values for the memcache store