* include/ruby/intern.h (rb_f_notimplement): should not respond to
not-implemented methods. as the address inside a DLL and the
imported address are different on Windows, use an exported
variable to share the same address.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50527 b2dd03c8-39d4-4d8f-98ff-823fe69b080e