Git commits in Moodle 1.9.9 by Sam Marshall

commit 4d16b11a389bc497adc272a82b48c6f939c52ccb
Author: Sam Marshall <s.marshall@open.ac.uk>
Date:   Thu, 20 May 2010 00:51:52 +0800
Tag:    v1.9.9

Lib MDL-22518 Group selector dropdowns destroy accessibility

commit 9476acfbcb35d722a4c88737e7bed020820117f1
Author: Sam Marshall <s.marshall@open.ac.uk>
Date:   Fri, 23 Apr 2010 19:13:23 +0800
Tag:    v1.9.9

weblib: MDL-22174 print_group_picture should not print empty links