change method locals to type object too (same as args)

test/typed/expressions/test_call.rb

@@ -26,7 +26,7 @@ module Register
     end
 
     def test_call_main_op
-      Register.machine.space.get_main.ensure_local(:bar , :Integer)
+      Register.machine.space.get_main.add_local(:bar , :Integer)
       @input    =s(:call,s(:name, :main),s(:arguments , s(:name, :bar) ))
       check
     end

test/typed/expressions/test_ops.rb

@@ -21,12 +21,12 @@ module Register
       end
     end
     def test_local_int
-      Register.machine.space.get_main.ensure_local(:bar , :Integer)
+      Register.machine.space.get_main.add_local(:bar , :Integer)
       @input    = s(:operator_value, :+, s(:name, :bar), s(:int, 3))
       check
     end
     def test_int_local
-      Register.machine.space.get_main.ensure_local(:bar , :Integer)
+      Register.machine.space.get_main.add_local(:bar , :Integer)
       @input    = s(:operator_value, :+, s(:int, 3), s(:name, :bar))
       check
     end

test/typed/expressions/test_vars.rb

@@ -10,7 +10,7 @@ module Register
     end
 
     def test_local
-      Register.machine.space.get_main.ensure_local(:bar , :Integer)
+      Register.machine.space.get_main.add_local(:bar , :Integer)
       @input    = s(:name, :bar)
       @output = Register::RegisterValue
       check