Fixing tests for implicit return

previous commit affected rather many test, as the implicit returns add extra instructions
Also added some explicit returns, so as not to test the return logic too much. return (ie return nl) is a knonwn 3 risc operation.

lib/parfait/object.rb

@@ -73,7 +73,7 @@
     def self.padded( len )
       a = 32 * (1 + ((len + 3)/32).floor )
       #puts "#{a} for #{len}"
-      a
+      return a
     end
 
     def self.padded_words( words )