Corrected update notice 

git-svn-id: https://plugins.svn.wordpress.org/multi-map/trunk@1023758 b8457f37-d9ea-0310-8a92-e5e31aec5664
Corrected update notice

git-svn-id: https://plugins.svn.wordpress.org/multi-map/trunk@1023761 b8457f37-d9ea-0310-8a92-e5e31aec5664