Migrate compresstype server setting from 3.1 game.ruleset
compresstype bzip2 has been obsoleted in 3.2. Settings loaded from old savegames are correctly migrated, but we have no migration for settings loaded from game.ruleset in compat mode from 3.1.
This causes a crash when saving game. Saving gamestart value in settings_game_save() pass wrong kind of parameter.
Saving gamestart values fixed.
compresstype bzip2 has been obsoleted in 3.2. Settings loaded from old savegames are correctly migrated, but we have no migration for settings loaded from game.ruleset in compat mode from 3.1.