Fix for issue 5744: also register parameter types for closure invocations to the backend.

tests/language/call_test.dart

Index: tests/language/call_test.dart
===================================================================
--- tests/language/call_test.dart	(revision 0)
+++ tests/language/call_test.dart	(revision 0)
@@ -0,0 +1,11 @@
+// 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.
+
+main() {
+  bar(a) {
+    return a is String;
+  }
+  Expect.isFalse(bar(1));
+  Expect.isTrue(bar.call('foo'));
+}