[empathy] irc-network-chooser-dialog: be more NULL-safe

[Guillaume Desmottes <gdesmott src gnome org>]

commit e1f5315d0733134b9ce40a40c1e8ffe2c4eb78b1
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Fri Jan 13 15:41:18 2012 +0100

    irc-network-chooser-dialog: be more NULL-safe

 .../empathy-irc-network-chooser-dialog.c           |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/libempathy-gtk/empathy-irc-network-chooser-dialog.c b/libempathy-gtk/empathy-irc-network-chooser-dialog.c
index 9d29aff..755eb58 100644
--- a/libempathy-gtk/empathy-irc-network-chooser-dialog.c
+++ b/libempathy-gtk/empathy-irc-network-chooser-dialog.c
@@ -132,6 +132,9 @@ dup_selected_network (EmpathyIrcNetworkChooserDialog *self,
   GtkTreeModel *model;
 
   selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->treeview));
+  if (selection == NULL)
+    return NULL;
+
   if (!gtk_tree_selection_get_selected (selection, &model, &iter))
     return NULL;
 
@@ -157,7 +160,7 @@ treeview_changed_cb (GtkTreeView *treeview,
   network = dup_selected_network (self, NULL);
   if (network == priv->network)
     {
-      g_object_unref (network);
+      g_clear_object (&network);
       return;
     }