* thread.c (double2timeval): convert the infinity to TIME_MAX to avoid
  SEGV by Thread.new {}.join(Float::INFINITY) on
  Debian GNU/Linux (amd64).



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39939 b2dd03c8-39d4-4d8f-98ff-823fe69b080e