win32: for strict ANSI
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41834 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
win32: for strict ANSI
(timer_thread_func): use __stdcall instead of _stdcall which is
unavailable in strict ANSI mode. [ruby-core:55312] [Bug #8495]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41834 b2dd03c8-39d4-4d8f-98ff-823fe69b080e