enumerator.c: adjust style [ci skip]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46071 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
enumerator.c: adjust style [ci skip]
method return value. [fix GH-617]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46071 b2dd03c8-39d4-4d8f-98ff-823fe69b080e