fix while.to_vool

sanitize normalizer on the way
- return ruby, let caller to_vool
- return single statement, not single? statements

test/ruby/test_while_statement.rb

@@ -19,7 +19,6 @@ module Ruby
       lst = compile( basic_while )
       assert_equal TrueConstant , lst.body.class
     end
-
     def reverse_while
       "true while(false)"
     end

test/ruby/test_while_statement1.rb

@@ -0,0 +1,41 @@
+require_relative 'helper'
+
+module Ruby
+  class TestWhileStatementVool < MiniTest::Test
+    include RubyTests
+    def setup
+      @lst = compile( "while(@arg) ; @arg = 1 ; end" ).to_vool
+    end
+    def test_class
+      assert_equal Vool::WhileStatement , @lst.class
+    end
+    def test_body_class
+      assert_equal Vool::IvarAssignment , @lst.body.class
+    end
+    def test_condition_class
+      assert_equal Vool::InstanceVariable , @lst.condition.class
+    end
+    def test_no_hoist
+      assert_nil @lst.hoisted
+    end
+  end
+  class TestWhileStatementHoist < MiniTest::Test
+    include RubyTests
+    def setup
+      @lst = compile( "while(arg > 1) ; arg = 1 ; end" ).to_vool
+    end
+    def test_class
+      assert_equal Vool::WhileStatement , @lst.class
+      assert_equal Vool::LocalAssignment , @lst.body.class
+    end
+    def test_condition_class
+      assert_equal Vool::LocalVariable , @lst.condition.class
+    end
+    def test_hoist
+      assert_equal Vool::LocalAssignment , @lst.hoisted.class
+    end
+    def test_hoist_is_cond
+      assert_equal @lst.hoisted.name , @lst.condition.name
+    end
+  end
+end