Map specific config settings not freed when selecting other map

[Loobinex]

To reproduce:

1. Download and install the halloween map pack
2. Start KeeperFX and go to the halloween pack in the free play levels list
3. Start map 'Desert Tomb'
4. Exit it again, returning to the map list
5. Start 'Belzebub'
   -> Notice the dungeon heart is transparent.

This is because map03110.objects.cfg (from Desert Tomb) has object 5 as transparent. Starting the new map does not change that.

[walt253]

I could be wrong but I think it's cause the params are not initialised.

In parse_objects_object_blocks

    if ((flags & CnfLd_AcceptPartial) == 0) {
        for (int i = 0; i < OBJECT_TYPES_MAX; i++) {
            objst = &game.conf.object_conf.object_cfgstats[i];
            LbMemorySet(objst->code_name, 0, COMMAND_WORD_LEN);
            objst->name_stridx = 201;
            objst->map_icon = 0;
            objst->genre = 0;
            objst->draw_class = ODC_Default;
            object_desc[i].name = objst->code_name;
            object_desc[i].num = i;
        }
    }

Only those are initialised.