[empathy] Make clear work on All's buffer

[Guillaume Desmottes <gdesmott src gnome org>]

commit e2df2195fbfdf96425e71f0c6bc006d56797879a
Author: Chandni Verma <chandniverma2112 gmail com>
Date:   Wed Feb 29 18:58:54 2012 +0530

    Make clear work on All's buffer
    
    Fixes: https://bugzilla.gnome.org/show_bug.cgi?id=671061

 src/empathy-debug-window.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/src/empathy-debug-window.c b/src/empathy-debug-window.c
index ac0bf9a..79e4d2a 100644
--- a/src/empathy-debug-window.c
+++ b/src/empathy-debug-window.c
@@ -1334,6 +1334,15 @@ debug_window_clear_clicked_cb (GtkToolButton *clear_button,
   GtkTreeIter iter;
   GtkListStore *active_buffer;
 
+  /* "All" is the first choice in the service chooser and it's buffer is
+   * not saved in the service-store but is accessed using a private
+   * reference */
+  if (gtk_combo_box_get_active (GTK_COMBO_BOX (priv->chooser)) == 0)
+    {
+      gtk_list_store_clear (priv->all_active_buffer);
+      return;
+    }
+
   gtk_combo_box_get_active_iter (GTK_COMBO_BOX (priv->chooser), &iter);
   gtk_tree_model_get (GTK_TREE_MODEL (priv->service_store), &iter,
       COL_ACTIVE_BUFFER, &active_buffer, -1);