Get rid of (void) parameter declarations.

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6827 8aca7d54-2c30-db11-9de9-000461428c89
FIX: call haltestelle_t::end_load_game after having resolved all convoy cargo

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6828 8aca7d54-2c30-db11-9de9-000461428c89