[glade/gbinding] Fix GladeProperty / GladeBinding ownership issues (thanks Juan!)

[Denis Washington <denisw src gnome org>]

commit 2bb65744a0680c942e76e9d08da82bf3da48b7d3
Author: Denis Washington <denisw src gnome org>
Date:   Fri Jun 10 13:58:08 2011 +0200

    Fix GladeProperty / GladeBinding ownership issues (thanks Juan!)
    
    Now it is clear: a bound GladeProperty owns the GladeBinding of which
    it is the target. A GladeBinding doesn't own any GladeProperty, neither
    the target nor the source. The former will destroy the GladeBinding
    when it is finalized, the latter is now only weakly referenced by
    the GladeBinding.

 gladeui/glade-binding.c  |   13 ++++++++++++-
 gladeui/glade-property.c |    1 +
 2 files changed, 13 insertions(+), 1 deletions(-)
---
diff --git a/gladeui/glade-binding.c b/gladeui/glade-binding.c
index 6416df3..1c2b691 100644
--- a/gladeui/glade-binding.c
+++ b/gladeui/glade-binding.c
@@ -236,9 +236,20 @@ void
 glade_binding_set_source (GladeBinding  *binding,
                           GladeProperty *source)
 {
+  GladeBindingPrivate *priv;
+  
   g_assert (GLADE_IS_BINDING (binding));
+
+  priv = GLADE_BINDING_GET_PRIVATE (binding);
+  
+  if (priv->source)
+    g_object_remove_weak_pointer (G_OBJECT (priv->source),
+                                  (gpointer *) &priv->source);
+
+  priv->source = source;
+  g_object_add_weak_pointer (G_OBJECT (priv->source),
+                             (gpointer *) &priv->source);
   
-  GLADE_BINDING_GET_PRIVATE (binding)->source = source;
   glade_binding_update (binding);
 }
 
diff --git a/gladeui/glade-property.c b/gladeui/glade-property.c
index 8d383fe..adbbda5 100644
--- a/gladeui/glade-property.c
+++ b/gladeui/glade-property.c
@@ -1580,6 +1580,7 @@ glade_property_set_binding (GladeProperty    *property,
   g_return_if_fail (glade_binding_get_target (binding) == property);
   
   property->priv->binding = binding;
+  g_object_ref (binding);
 }
 
 static gint glade_property_su_stack = 0;