pass return integer back out through exit

for testing of binaries later (and off course general correctness)
Some tests were using the fact that the interpreter was used, changed those to return ints rather than strings

test/risc/interpreter/while/test_while_cmp.rb

@@ -47,13 +47,13 @@ module Risc
              SlotToReg, RegToSlot, SlotToReg, SlotToReg, LoadConstant,
              OperatorInstruction, IsZero, SlotToReg, SlotToReg, RegToSlot,
              SlotToReg, Branch, SlotToReg, RegToSlot, SlotToReg,
-             SlotToReg, SlotToReg, FunctionReturn, Transfer, Syscall,
-             NilClass]
-       assert_kind_of Parfait::Integer , get_return
-       assert_equal 1 , get_return.value
+             SlotToReg, SlotToReg, FunctionReturn, SlotToReg, SlotToReg,
+             Branch, Transfer, Syscall, NilClass]
+       assert_kind_of Fixnum , get_return
+       assert_equal 1 , get_return
     end
     def test_exit
-      done = main_ticks(185)
+      done = main_ticks(188)
       assert_equal Syscall ,  done.class
     end
   end