[rygel] media-db: Return empty result on unknown criteria

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit fd9fc326dfcea5233d0e403d4cb6eb1216889fc5
Author: Jens Georg <mail jensge org>
Date:   Sat Nov 21 01:21:04 2009 +0100

    media-db: Return empty result on unknown criteria

 src/rygel/rygel-media-db-container.vala |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/rygel/rygel-media-db-container.vala b/src/rygel/rygel-media-db-container.vala
index 44f4d18..0f62b38 100644
--- a/src/rygel/rygel-media-db-container.vala
+++ b/src/rygel/rygel-media-db-container.vala
@@ -75,6 +75,12 @@ public class Rygel.MediaDBContainer : MediaContainer {
         var args = new GLib.ValueArray(0);
         var filter = this.search_expression_to_sql (expression, args);
 
+        if (filter == null) {
+            // use basic search
+            total_matches = 0;
+            return new Gee.ArrayList<MediaObject>();
+        }
+
         debug ("Orignal search: %s", expression.to_string());
         debug ("Parsed search expression: %s", filter);