[tracker/tracker-0.6] Bugfix thumbnailer, when no items must be thumbnailed, don't send a request

[Philip Van Hoof <pvanhoof src gnome org>]

commit fca9fc629d65b028cf6e674f4df551e83f117317
Author: Philip Van Hoof <philip codeminded be>
Date:   Mon Jun 15 17:40:12 2009 +0200

    Bugfix thumbnailer, when no items must be thumbnailed, don't send a request

 src/libtracker-common/tracker-thumbnailer.c |   24 ++++++++++++++++++++++++
 1 files changed, 24 insertions(+), 0 deletions(-)
---
diff --git a/src/libtracker-common/tracker-thumbnailer.c b/src/libtracker-common/tracker-thumbnailer.c
index d8a1e3c..45f1bb7 100644
--- a/src/libtracker-common/tracker-thumbnailer.c
+++ b/src/libtracker-common/tracker-thumbnailer.c
@@ -423,10 +423,34 @@ tracker_thumbnailer_queue_send (void)
 	TrackerThumbnailerPrivate *private;
 	GStrv uri_strv;
 	GStrv mime_type_strv;
+	guint len = 0;
 
 	private = g_static_private_get (&private_key);
 	g_return_if_fail (private != NULL);
 
+	if (private->uris) {
+		len = g_slist_length (private->uris);
+	}
+
+	if (!len) {
+		g_message ("Thumbnailer queue has no items ...");
+
+		if (private->uris) {
+			g_slist_free (private->uris);
+			private->uris = NULL;
+		}
+
+		if (private->mime_types) {
+			if (g_slist_length (private->mime_types) > 0) {
+				g_slist_foreach (private->mime_types, (GFunc) g_free, NULL);
+			}
+			g_slist_free (private->mime_types);
+			private->mime_types = NULL;
+		}
+
+		return;
+	}
+
 	uri_strv = tracker_dbus_slist_to_strv (private->uris);
 	mime_type_strv = tracker_dbus_slist_to_strv (private->mime_types);