hash: improve new hash_iter interface.

Most calls to hash_iter_next are passing a null parameter
for the object; only hash_next uses that parameter.
Let's make hash_iter_next a wrapper which doesn't have
that parameter.

This interface will soon be exposed to other source files, so
it's important to streamline it.

* hash.c (hash_iter_next_impl): New function, exact copy of
hash_iter_next.
(hash_iter_next): Reduced to wrapper for hash_iter_next_impl,
with one less argument.
(hash_next): Call hash_iter_next_impl instead of
hash_iter_next.
(maphash, group_by, group_reduce, hash_uni, hash_diff,
hash_symdiff, hash_isec, hash_subset, hash_update,
hash_revget, hash_invert): Remove null argument from
hash_iter_next calls.

0 files changed, 0 insertions, 0 deletions