Fix a number of issues with determining the type of stdio

runtime/bin/file.h

Index: runtime/bin/file.h
diff --git a/runtime/bin/file.h b/runtime/bin/file.h
index a4c6d4bb5f59d68846d0c223264cc68c16bebd7c..0895a8466d37fad19e955e56e8b651e2e1c13727 100644
--- a/runtime/bin/file.h
+++ b/runtime/bin/file.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
@@ -54,7 +54,7 @@ class File {
     kPipe = 1,
     kFile = 2,
     kSocket = 3,
-    kOther = -1
+    kOther = 4
   };
 
   enum FileRequest {