[rygel] dbus-thumbnailer: Don't try to remove non-existent timeout source

[Debarshi Ray <debarshir src gnome org>]

commit 2ef90a1330cb4d5a2d5764e76cfbac3aed16baee
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Sep 10 12:35:10 2014 +0200

    dbus-thumbnailer: Don't try to remove non-existent timeout source
    
    https://bugzilla.gnome.org/show_bug.cgi?id=736403

 src/librygel-server/rygel-dbus-thumbnailer.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/librygel-server/rygel-dbus-thumbnailer.vala b/src/librygel-server/rygel-dbus-thumbnailer.vala
index c2a1e6e..f2f174c 100644
--- a/src/librygel-server/rygel-dbus-thumbnailer.vala
+++ b/src/librygel-server/rygel-dbus-thumbnailer.vala
@@ -71,6 +71,7 @@ internal class Rygel.DbusThumbnailer : GLib.Object {
 
         if (this.timeout_id != 0) {
             Source.remove (this.timeout_id);
+            this.timeout_id = 0;
         }
 
         if (this.uris.size < THUMBNAIL_MAX_QUEUE_SIZE) {