[grilo-plugins] [upnp] Keep always root category ID as NULL

[Juan A. Suarez Romero <jasuarez src gnome org>]

commit f319fc1943dc796e2eb30fad99cd409adc31fb33
Author: Juan A. Suarez Romero <jasuarez igalia com>
Date:   Mon May 24 10:00:49 2010 +0200

    [upnp] Keep always root category ID as NULL

 src/upnp/grl-upnp.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/src/upnp/grl-upnp.c b/src/upnp/grl-upnp.c
index c98f3cb..1aa5e42 100644
--- a/src/upnp/grl-upnp.c
+++ b/src/upnp/grl-upnp.c
@@ -862,7 +862,12 @@ build_media_from_didl (GrlMedia *content,
   }
 
   id = gupnp_didl_lite_object_get_id (didl_node);
-  grl_media_set_id (media, id);
+  /* Root category's id is always NULL */
+  if (g_strcmp0 (id, "0") == 0) {
+    grl_media_set_id (media, NULL);
+  } else {
+    grl_media_set_id (media, id);
+  }
 
   didl_props = didl_get_supported_resources (didl_node);