Git commits in Moodle 2.5.4 by Jean-Philippe Gaudreau

commit 990a792039498dd5d03c8b5208b5e95197691496
Author: Jean-Philippe Gaudreau <jp.gaudreau@umontreal.ca>
Date:   Thu, 12 Dec 2013 00:07:29 +0800
Tag:    v2.5.4

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