Fix vool assignments after call rework

also small fix for if and return, as they need to execute sneds and yields (not just sends), so testing for Call not SendStatement

test/ruby/test_assignment1.rb

@@ -8,8 +8,26 @@ module Ruby
     def setup
       @lst = compile( "@foo = a.call(b)").to_vool
     end
-    def test_s
-      assert_equal "" , @lst.to_s
+    def test_class
+      assert_equal Vool::Statements , @lst.class
+    end
+    def test_first_class
+      assert_equal Vool::LocalAssignment , @lst[0].class
+    end
+    def test_first_name
+      assert @lst[0].name.to_s.start_with?("tmp_")
+    end
+    def test_second_class
+      assert_equal Vool::LocalAssignment , @lst[1].class
+    end
+    def test_second_name
+      assert @lst[1].name.to_s.start_with?("tmp_")
+    end
+    def test_last_class
+      assert_equal Vool::IvarAssignment , @lst[2].class
+    end
+    def test_second_name
+      assert_equal :foo,  @lst[2].name
     end
   end
 end