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/instructions/test_load_data.rb

@@ -0,0 +1,24 @@
+require_relative "../helper"
+
+module Risc
+  class TestLoadData < MiniTest::Test
+    def setup
+      Parfait.boot!({})
+    end
+    def risc(i)
+      Risc.load_data("source" , 1)
+    end
+    def test_const
+      assert_equal  LoadData , risc(1).class
+    end
+    def test_val
+      assert_equal  1 , risc(1).constant
+    end
+    def test_reg
+      assert_equal  :fix_1 , risc(1).register.symbol
+    end
+    def test_reg_type
+      assert_equal  "Integer_Type" , risc(1).register.type.name
+    end
+  end
+end