Fixes RawReceivePort.hashCode

tests/isolate/raw_port_test.dart

Index: tests/isolate/raw_port_test.dart
diff --git a/tests/isolate/raw_port_test.dart b/tests/isolate/raw_port_test.dart
index 1da1484f03df0815295e5ef84abb20bd3fd60a42..1b88949db797fb26891d5dd60a413bd85f57c620 100644
--- a/tests/isolate/raw_port_test.dart
+++ b/tests/isolate/raw_port_test.dart
@@ -31,6 +31,12 @@ main([args, port]) {
     });
   });
 
+  test("raw receive hashCode", () {
+    RawReceivePort port = new RawReceivePort();
+    expect(port.hashCode is int, true);
+    port.close();
+  });
+
   test("raw receive twice - change handler", () {
     RawReceivePort port = new RawReceivePort();
     Isolate.spawn(remote2, port.sendPort);