Added type variable to generic in Stream#take() so that subsequent type checks will work correctly.

sdk/lib/async/stream.dart

 // Copyright (c) 2013, 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.
 
 part of dart.async;
 
 // -------------------------------------------------------------------
 // Core Stream types
 // -------------------------------------------------------------------
 
@@ skipping 824 matching lines @@
    *
    * Internally the method cancels its subscription after these elements. This
    * means that single-subscription (non-broadcast) streams are closed and
    * cannot be reused after a call to this method.
    *
    * The returned stream is a broadcast stream if this stream is.
    * For a broadcast stream, the events are only counted from the time
    * the returned stream is listened to.
    */
   Stream<T> take(int count) {
-    return new _TakeStream(this, count);
+    return new _TakeStream<T>(this, count);
   }
 
   /**
    * Forwards data events while [test] is successful.
    *
    * The returned stream provides the same events as this stream as long
    * as [test] returns [:true:] for the event data. The stream is done
    * when either this stream is done, or when this stream first provides
    * a value that [test] doesn't accept.
    *
@@ skipping 879 matching lines @@
 class _ControllerEventSinkWrapper<T> implements EventSink<T> {
   EventSink _sink;
   _ControllerEventSinkWrapper(this._sink);
 
   void add(T data) { _sink.add(data); }
   void addError(error, [StackTrace stackTrace]) {
     _sink.addError(error, stackTrace);
   }
   void close() { _sink.close(); }
 }