[rygel] core: Use constant for 'transferMode' header

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 99b09c193649e66aa618cce402f567fffe5c82af
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Wed Mar 23 23:22:54 2011 +0200

    core: Use constant for 'transferMode' header

 src/rygel/rygel-http-get-handler.vala |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/rygel/rygel-http-get-handler.vala b/src/rygel/rygel-http-get-handler.vala
index 36a0191..503c0a6 100644
--- a/src/rygel/rygel-http-get-handler.vala
+++ b/src/rygel/rygel-http-get-handler.vala
@@ -28,12 +28,14 @@ using GUPnP;
  * HTTP GET request handler interface.
  */
 internal abstract class Rygel.HTTPGetHandler: GLib.Object {
+    private const string TRANSFER_MODE_HEADER = "transferMode.dlna.org";
+
     public Cancellable cancellable { get; set; }
 
     // Add response headers.
     public virtual void add_response_headers (HTTPGet request)
                                               throws HTTPRequestError {
-        var mode = request.msg.request_headers.get_one ("transferMode.dlna.org");
+        var mode = request.msg.request_headers.get_one (TRANSFER_MODE_HEADER);
         if (mode != null) {
             // FIXME: Is it OK to just copy the value of this header from
             // request to response? All we do to entertain this header is to