FIX: message options for scenario messages were not visible

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7144 8aca7d54-2c30-db11-9de9-000461428c89
FIX: correctly transfer koord::invalid to squirrel
FIX crash when scenario messages are opened


git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7145 8aca7d54-2c30-db11-9de9-000461428c89
remove unused variable

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7146 8aca7d54-2c30-db11-9de9-000461428c89
FIX: open correct city window even if townhall is located within limits of another city

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7147 8aca7d54-2c30-db11-9de9-000461428c89