[blam] Clear the item's extensions on first load

[Carlos Martín Nieto <cmartin src gnome org>]

commit 4a435392a15055d08488c5f282ab16611a43fa12
Author: Carlos Martín Nieto <carlos cmartin tk>
Date:   Thu Mar 24 00:03:25 2011 +0100

    Clear the item's extensions on first load
    
    Clear an item's extensions once it's loaded from disk. Failure to do
    so will cause these values to reset on each update.
    
    Signed-off-by: Carlos Martín Nieto <carlos cmartin tk>

 src/Item.cs |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/Item.cs b/src/Item.cs
index 54014d2..f09b42e 100644
--- a/src/Item.cs
+++ b/src/Item.cs
@@ -121,6 +121,12 @@ namespace Imendio.Blam {
         public Item(SyndicationItem item) : base(item)
         {
             FillItem(item);
+            /*
+             * If we don't clear the extensions, the values will be
+             * reset on each update (Unread and ref_cnt being the most
+             * worrysome.
+             */
+            ElementExtensions.Clear();
         }
 
         public bool Update(SyndicationItem item)