[rygel/rygel-0-12] external: Don't crash on hierarchical update

[Jens Georg <jensgeorg src gnome org>]

commit 40abd1c79f97e6023c66ffc55fbfe3b1143c4eb9
Author: Jens Georg <mail jensge org>
Date:   Wed Jan 18 17:37:47 2012 +0100

    external: Don't crash on hierarchical update
    
    If a MediaServer2 provider sends an update for /foo/bar/baz and
    /foo/bar chances are that the update for /foo/bar invalidates the
    parent pointer in /foo/bar/baz causing a crash of various sorts.
    
    Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=759206

 src/plugins/external/rygel-external-container.vala |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/src/plugins/external/rygel-external-container.vala b/src/plugins/external/rygel-external-container.vala
index 2df9f0c..e789997 100644
--- a/src/plugins/external/rygel-external-container.vala
+++ b/src/plugins/external/rygel-external-container.vala
@@ -63,6 +63,15 @@ public class Rygel.External.Container : Rygel.MediaContainer,
                                          DBusProxyFlags.DO_NOT_LOAD_PROPERTIES);
 
         this.update_container.begin (true);
+        if (parent != null) {
+            parent.add_weak_pointer (&this.parent);
+        }
+    }
+
+    ~Container() {
+        if (this.parent != null) {
+            this.parent.remove_weak_pointer (&this.parent);
+        }
     }
 
     public override async MediaObjects? get_children (uint         offset,