CODE: init outside loop - warning suppression

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6468 8aca7d54-2c30-db11-9de9-000461428c89
FIX: don't continually mark selected menu buttons as dirty

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6469 8aca7d54-2c30-db11-9de9-000461428c89