backported r33153 from trunk.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@33154 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
backported r33153 from trunk.
win32ole is required. in such case, win32ole redefines
Thread#initialize, and the block argument becomes to be not the top
of the thread, then this testcase always fails.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@33154 b2dd03c8-39d4-4d8f-98ff-823fe69b080e