Item12180: use Explicit codset constant

git-svn-id: http://svn.foswiki.org/trunk/core@16432 0b4bb1d4-4e5a-0410-9cc4-b2b747904278
Item12180: Fix for "used once"

git-svn-id: http://svn.foswiki.org/trunk/core@16433 0b4bb1d4-4e5a-0410-9cc4-b2b747904278