extern FEAT_IDX feat_wall_outer;
extern FEAT_IDX feat_wall_inner;
extern FEAT_IDX feat_wall_solid;
-extern FEAT_IDX floor_type[100], fill_type[100];
+extern FEAT_IDX feat_ground_type[100], fill_type[100];
extern bool now_damaged;
extern COMMAND_CODE now_message;
extern bool use_menu;