* lib/resolv.rb (Resolv::DNS::Message::MessageDecoder): Raise
  DecodeError if no data before the limit.
  Reported by Will Bryant.  [ruby-core:60557] [Bug #9498]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44884 b2dd03c8-39d4-4d8f-98ff-823fe69b080e