git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@16471 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
there is no path to set it on win32. this patch is derived from
[ruby-core:16787], submitted by Luis Lavena
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@16471 b2dd03c8-39d4-4d8f-98ff-823fe69b080e