* thread_pthread.c (ruby_init_stack): ignore `STACK_END_ADDRESS'
  if Ruby interpreter is running on co-routine.
  [Feature #2294]
  https://bugs.ruby-lang.org/issues/2294#note-18



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38905 b2dd03c8-39d4-4d8f-98ff-823fe69b080e