merge revision(s) 44377: [Backport #9290]

	README.EXT.ja: fix probable typo

	* README.EXT.ja (Appendix D): fix probable typo. RHASH_PTR() is
  not defined.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@44416 b2dd03c8-39d4-4d8f-98ff-823fe69b080e