Handle super != and ?

tests/language/argument_definition_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // Dart test program for testing argument definition test.
 
 int test(int a, {int b: 2, int c: 3}) {
   int result = 0;
   ?b;
   ?result;  /// 01: compile-time error
   if (?a) {
@@ skipping 37 matching lines @@
       result += 200;
     }
     // Equivalent to: (!?c) ? ?b : ?c.
     if (!?a?!?b:!?c == ?a??b:?c) {
       result += 400;
     }
     return result;
   };
 }
 
+tl_test([a]) => ?a;
+
 main() {
   // Use a loop to test optimized version as well.
   for (int i = 0; i < 1000; i++) {
     Expect.equals(100, test(1));
     Expect.equals(720, test(1, b: 2));
     Expect.equals(523, test(1, b: 2, c: 3));
     Expect.equals(703, test(1, c: 3));
 
     Expect.equals(100, closure_test(1)());
     Expect.equals(720, closure_test(1, b: 2)());
     Expect.equals(523, closure_test(1, b: 2, c: 3)());
     Expect.equals(703, closure_test(1, c: 3)());
+
+    Expect.equals(true, tl_test(0));
+    Expect.equals(false, tl_test());
   }
 }