Git commits in Moodle 2.4.5 by Dmytro Vorona

commit d12129060706bb7e4d7104365c158fe9a8458235
Author: Dmytro Vorona <alendit@gmail.com>
Date:   Mon, 25 Mar 2013 21:19:25 +0800
Tag:    v2.4.5

MDL-40297 Hide empty categories in my courses

commit 073a972375318b9bdaf7dd54ec26a3bdc08a096e
Author: Dmytro Vorona <alendit@gmail.com>
Date:   Mon, 25 Mar 2013 17:57:31 +0800
Tag:    v2.4.5

MDL-38631 Fixed faulty add_category call, introduced in 758103