Multiple added cron job bug removed. 

git-svn-id: https://plugins.svn.wordpress.org/wp-user-avatar/trunk@1050084 b8457f37-d9ea-0310-8a92-e5e31aec5664
Version 1.9.15 - Multiple Cron job added bug resolved. 

git-svn-id: https://plugins.svn.wordpress.org/wp-user-avatar/trunk@1050085 b8457f37-d9ea-0310-8a92-e5e31aec5664