And we are green again

After having over 600 failing tests at one point, this does feel good.
Even better, most of the risc/interpreter tests where i didn't change anything came gree without changing the tests. ie we have binary compatibility.

test/risc/interpreter/calling/test_minus.rb

@@ -41,7 +41,7 @@ module Risc
       ret = main_ticks(68)
       assert_equal FunctionReturn ,  ret.class
       assert_equal :r1 ,  ret.register.symbol
-      assert_equal 24204 ,  @interpreter.get_register(ret.register)
+      assert_equal 23196 ,  @interpreter.get_register(ret.register)
     end
   end
 end