* win32/win32.c (do_select): constify timeout.

* win32/win32.c (rb_w32_select_with_thread): constify 10ms wait and
  0ms wait structs.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42792 b2dd03c8-39d4-4d8f-98ff-823fe69b080e