Update installer

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6388 8aca7d54-2c30-db11-9de9-000461428c89
Release of 112.2

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6389 8aca7d54-2c30-db11-9de9-000461428c89
FIX: compile on Haiku again

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6390 8aca7d54-2c30-db11-9de9-000461428c89