[rygel] server: Don't lose LastChange events

[Jens Georg <jensgeorg src gnome org>]

commit 6ab491c0a0a060e2b520a443665968c846b5a86e
Author: Jens Georg <jensg openismus com>
Date:   Tue Dec 11 16:49:17 2012 +0100

    server: Don't lose LastChange events
    
    Once sent, the boolean flag was set to true but never reset to false again so
    only the event added last would show up in the LastChange that were sent
    afterwards.

 src/librygel-server/rygel-last-change.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/librygel-server/rygel-last-change.vala b/src/librygel-server/rygel-last-change.vala
index f9c4c75..87798cb 100644
--- a/src/librygel-server/rygel-last-change.vala
+++ b/src/librygel-server/rygel-last-change.vala
@@ -49,6 +49,7 @@ internal class Rygel.LastChange : Object {
 
     public void add_event (LastChangeEntry entry) {
         if (this.clear_on_add) {
+            this.clear_on_add = false;
             this.entries.clear ();
         }
         this.entries.add (entry);