Fix bug with marshalling experiments

Author: ridiculous

lib/scientist/experiment.rb

@@ -345,7 +345,7 @@ def marshal_dump
     [@name, @result, @raise_on_mismatches]
   end
 
-  def marshal_load
+  def marshal_load(array)
     @name, @result, @raise_on_mismatches = array
   end
 end