Add a test for checking that enough positional arguments were passed in.

dart/tests/language/src/NotEnoughPositionalArgumentsTest.dart

Index: dart/tests/language/src/NotEnoughPositionalArgumentsTest.dart
===================================================================
--- dart/tests/language/src/NotEnoughPositionalArgumentsTest.dart	(revision 0)
+++ dart/tests/language/src/NotEnoughPositionalArgumentsTest.dart	(revision 0)
@@ -0,0 +1,21 @@
+// 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.
+
+foo(a, [b]) {
+}
+
+class A {
+  A(a, [b]);
+}
+
+class B {
+  B()
+    : super(b: 1) /// 01: runtime error
+  ;
+}
+
+main() {
+  new B(); /// 01: continued
+  foo(b: 1); /// 02: runtime error
+}