* tree.h (get_identifier) Define a macro form of get_identifier
that calls get_identifier_with_length when the string is constant.
(get_identifier_with_length): Change type of second argument to
size_t in prototype.
* stringpool.c (get_identifier): Undefine the macro before giving
the function definition.
(get_identifier_with_length): Change type of second argument to
size_t in function definition.
* hashtable.c (calc_hash): Change type of second argument to size_t.
(ht_lookup): Change type of third argument to size_t. Reorganize
to speed-up the cases where the hash table slot is empty, or the
first probe matches (i.e. there isn't a collision).
* hashtable.h (ht_lookup): Adjust function prototype.
From-SVN: r70256