basho/riak_kv — pull request #719 by cmeiklejohn (2013-11-05 19:02:03+00:00)
Title: Avoid mutator code path when necessary.

Avoid the mutator code path completely when there are no registered
mutators, which prevents the mutators_applied item from being added to
the metadata dictionary when there are no mutators.

@Vagabond @engelsanchez @lordnull