Fixed broken ActorRef #post! timeout spec.

Author: jdantonio

lib/concurrent/actor/simple_actor_ref.rb

@@ -37,7 +37,7 @@ def post(*msg, &block)
     end
 
     def post!(timeout, *msg)
-      raise Concurrent::TimeoutError if timeout <= 0
+      raise Concurrent::TimeoutError unless timeout.nil? || timeout >= 0
       ivar = self.post(*msg)
       ivar.value(timeout)
       if ivar.incomplete?

spec/concurrent/actor/actor_ref_shared.rb

@@ -164,10 +164,7 @@ def receive(*msg)
 
     it 'blocks forever when the timeout is nil' do
       start = Time.now.to_f
-      begin
-        subject.post!(nil, :sleep, 1)
-      rescue
-      end
+      subject.post!(nil, :sleep, 1)
       delta = Time.now.to_f - start
       delta.should > 1
     end