Fix functions as default values in records

successful check_value/2 needs to return its second argument

Author: cabo

lib/elixir/lib/record.ex

@@ -916,6 +916,7 @@ defmodule Record do
       raise ArgumentError, message: "record field default value #{inspect atom} can only contain " <>
                                     "functions that point to an existing &Mod.fun/arity"
     end
+    other
   end
 
   defp check_value(atom, other) when is_reference(other) or is_pid(other) or is_port(other) do