Fix div10 and test

fix and use load_data (similar to load_constant)
and integrate into load_object when appropriate (ie for integers)

test/risc/test_callable_compiler.rb

@@ -31,5 +31,10 @@ module Risc
       assert_equal LoadConstant , @compiler.current.class
       assert_equal Parfait::Space , @compiler.current.constant.class
     end
+    def test_load_data
+      object = @compiler.load_object(1)
+      assert_equal LoadData , @compiler.current.class
+      assert_equal Integer , @compiler.current.constant.class
+    end
   end
 end