* lib/ostruct.rb: Fix new_ostruct_member to correctly avoid
	  redefinition [#11901]

	* lib/ostruct.rb (freeze): define deferred accessors before
	  freezing to get rid of an error when just reading frozen
	  OpenStruct.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54388 b2dd03c8-39d4-4d8f-98ff-823fe69b080e