(symbol_check_defined,

(symbol_check_defined,
symbol_check_alias_consistency, symbol_pack, symbol_translation,
hash_compare_symbol, hash_symbol):
Now inline.  Return bool, not int.
(symbol_check_defined_processor,
symbol_check_alias_consistency_processor, symbol_pack_processor,
symbol_translation_processor, hash_symbol_comparator,
hash_symbol_hasher): New functions, to avoid casts.
(symbols_new, symbols_do, symbols_check_defined,
symbols_token_translations_init):
Use new functions instead of casting old functions unportably.
(symbol_free): Remove; unused.
(symbol_get): Remove cast in lhs of assignment.
(symbols_do): Now static.  Accept generic arguments, not hashing-related ones.