Git commits in Moodle 2.5.x by Anton Fletcher

commit 84c3f002eab2c5d2181c755a6df7f26e43ba35f5
Author: Anton Fletcher <salmonmoose@gmail.com>
Date:   Fri, 04 Oct 2013 14:16:40 +0800
Tag:    v2.5.3

MDL-35146 mod_wiki: fixed issue where pages for deleted groups caused an error on restore