Ruby

encoding.c: use built-in encoding indexes

• encoding.c (enc_inspect, rb_locale_encindex),
  (enc_set_filesystem_encoding, rb_filesystem_encindex): use built-in
  encoding indexes directly.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41740 b2dd03c8-39d4-4d8f-98ff-823fe69b080e