pass parfait method to to_mom

previously it was the toll incarnation, and that is almost the same
But for the type of self. This s by definition only known in the
parfait method
And we need it off course for type checking/dispatch

lib/vool/statements/local_assignment.rb

@@ -8,7 +8,7 @@ module Vool
     end
 
     def to_mom( method )
-      if method.args_type.variable_index(@name)
+      if method.arguments.variable_index(@name)
         type = :arguments
       else
         type = :frame