[rygel] core: Correct error on missing 'Elements' node

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit bdf0d1518960620cee668c772ab6c2f733b497f4
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Wed May 26 23:52:34 2010 +0300

    core: Correct error on missing 'Elements' node
    
    Throw correct error on missing 'Elements' node in CreateObject action.

 src/rygel/rygel-content-directory.vala |    1 +
 src/rygel/rygel-item-creator.vala      |    7 ++++++-
 2 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/src/rygel/rygel-content-directory.vala b/src/rygel/rygel-content-directory.vala
index 52857b2..4fc0215 100644
--- a/src/rygel/rygel-content-directory.vala
+++ b/src/rygel/rygel-content-directory.vala
@@ -30,6 +30,7 @@ using Gee;
  */
 public errordomain Rygel.ContentDirectoryError {
     NO_SUCH_OBJECT = 701,
+    BAD_METADATA = 712,
     RESTRICTED_PARENT = 713,
     CANT_PROCESS = 720,
     INVALID_ARGS = 402
diff --git a/src/rygel/rygel-item-creator.vala b/src/rygel/rygel-item-creator.vala
index 2d863c3..e656d2e 100644
--- a/src/rygel/rygel-item-creator.vala
+++ b/src/rygel/rygel-item-creator.vala
@@ -91,7 +91,12 @@ internal class Rygel.ItemCreator: GLib.Object, Rygel.StateMachine {
         this.action.get ("ContainerID", typeof (string), out this.container_id,
                          "Elements", typeof (string), out this.elements);
 
-        if (this.container_id == null || this.elements == null) {
+        if (this.elements == null) {
+            throw new ContentDirectoryError.BAD_METADATA (
+                                        _("'Elements' argument missing."));
+        }
+
+        if (this.container_id == null) {
             // Sorry we can't do anything without ContainerID
             throw new ContentDirectoryError.NO_SUCH_OBJECT (
                                         _("No such object"));