put_empobj() used struct empobj member uid, which is valid only for
units. Existing users pass only units, fortunately. Fix by making it
take type and uid parameters.
get_empobj_chr() and emp_obj_chr_name() access struct sctstr member
sct_type through struct empobj member type. This is technically
non-portable, because the two differ in signedness. It was also
undocumented. Fix by making sct_type signed. sct_newtype as well,
for consistency.
map_char() uses unsigned char for a sector type argument. Change that
to int. Matches how this is done elsewhere.
(gamestr, EF_GAME, game_ca): New.
(empfile): Declare the table.
(ef_open_srv, ef_close_srv): Open and close it.
(main): Create it.
(empobj_storage): New member game.
(EF_DYNMAX): New.
(EF_IS_GAME_STATE): Use it.
(emp_obj_chr_name): New. Returns a pointer to the characteristics name
for an empobj.
(unit_map): Simplify unit_map() by using get_empobjp() and
emp_obj_chr_name().
(map, cmd_move_map): Switch to EF_SHIP as unit_map does not default
to EF_SHIP for EF_BAD anymore.
(get_empobj_chr): New. Get characteristics for empobj.
(mission, build_mission_list_type): Switch to use new
functions put_empobj() and get_empobj_chr().
other. Ensure headers in include/ can be included in any order
(except for econfig-spec.h, which is special). New header types.h to
help avoid inclusion cycles. Sort include directives. Remove some
superflous includes.
oprange, show_mission, nameofitem, build_mission_list_type,
unit_map, xdvisible, trdswitchown, ontradingblock, trad, check_trade,
unit_type_name, start_stop_unit, scut, scra, mission, multifire,
perform_mission, fuel, NSC_GENITEM): Replace struct genitem with
struct empobj. Remove genitem.h and create a new file empobj.h.
Replace multiple instances of unions of ef_type structures with
one standard union empobj_storage which is a superset of the individual
instances.
