Git commits in Moodle 3.0.3 by Josh Marshall

commit 6d425afa4fdea40e7ad9cd10631b4142fa2217a3
Author: Josh Marshall <josh.marshall@netspot.com.au>
Date:   Thu, 29 Oct 2015 13:21:13 +0800
Tag:    v3.0.3

MDL-52930 forum: Correct get_unmailed_posts logic