Author: Rajesh Taneja
MDL-34612 Restore: Gracefully handle empty section title while restoring
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4db18636875ac4902b3e306bf843d71d851f1827
http://github.com/moodle/moodle/commit/4db18636875ac4902b3e306bf843d71d851f1827
+ 2.4 en [unnamedsection,core_backup]