[rygel-grilo] Do not invoke Grilo if there are no keys

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

commit 3bc7a3c74830f6b0e0274b57bc63bc272b784dd8
Author: Juan A. Suarez Romero <jasuarez igalia com>
Date:   Thu Apr 15 16:15:42 2010 +0200

    Do not invoke Grilo if there are no keys
    
    As 'parent' key is not handled by Grilo, if user is asking only for that key,
    do no send a request to Grilo; just resolve the key and return the result.

 src/rygel-grilo.c |   16 ++++++++++------
 1 files changed, 10 insertions(+), 6 deletions(-)
---
diff --git a/src/rygel-grilo.c b/src/rygel-grilo.c
index 49c5724..fe86865 100644
--- a/src/rygel-grilo.c
+++ b/src/rygel-grilo.c
@@ -388,12 +388,16 @@ get_properties_cb (const gchar *id,
   rgdata->parent_id = get_parent_id (id);
   media = unserialize_media (GRL_METADATA_SOURCE (rgdata->source), id);
 
-  grl_media_source_metadata (rgdata->source,
-                             media,
-                             rgdata->keys,
-                             GRL_RESOLVE_FULL | GRL_RESOLVE_IDLE_RELAY,
-                             metadata_cb,
-                             rgdata);
+  if (rgdata->keys) {
+    grl_media_source_metadata (rgdata->source,
+                               media,
+                               rgdata->keys,
+                               GRL_RESOLVE_FULL | GRL_RESOLVE_IDLE_RELAY,
+                               metadata_cb,
+                               rgdata);
+  } else {
+    metadata_cb (rgdata->source, media, rgdata, NULL);
+  }
 
   wait_for_result (rgdata);