[FIX] Tracker maps fails when , (comma) is the server system's decimal point.
Tracker now always store the location using a . (point) as a decimal point.
(Problem since 9.x it seems)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/11.x@46420 b456876b-0849-0410-b77d-98878d47e9d5