vm.c: suppress warning
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38640 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
vm.c: suppress warning
non-pthread platforms.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38640 b2dd03c8-39d4-4d8f-98ff-823fe69b080e