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/test_dynamic_call.rb

@@ -39,9 +39,10 @@ module Risc
              FunctionReturn, SlotToReg, SlotToReg, RegToSlot, SlotToReg,
              SlotToReg, RegToSlot, SlotToReg, SlotToReg, RegToSlot,
              SlotToReg, SlotToReg, SlotToReg, Branch, FunctionReturn,
-             Transfer, Syscall, NilClass]
-       assert_equal Parfait::Integer , get_return.class
-       assert_equal 1 , get_return.value
+             SlotToReg, SlotToReg, Branch, Transfer, Syscall,
+             NilClass]
+       assert_equal Fixnum , get_return.class
+       assert_equal 1 , get_return
     end
 
     def test_call_main
@@ -66,7 +67,7 @@ module Risc
       assert_equal Fixnum , link.class
     end
     def test_sys
-      sys = main_ticks(142)
+      sys = main_ticks(145)
       assert_equal Syscall ,  sys.class
     end
   end