thread_win32.c: no GVL for interrupt_event
* thread_win32.c (w32_wait_events): do not acquire GVL, to fix
deadlock at read/close race condition. instead, just ignore
interrupt_event if it is closed.
thread_win32.c: fix index
* thread_win32.c (w32_wait_events): fix wait object index in the
case of interrupt_event is not usable.
merge revision(s) 58370,58382: [Backport #13530]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@59217 b2dd03c8-39d4-4d8f-98ff-823fe69b080e