[gtk+] ComboBox: Dodge possible surplus disconnects

[Daniel Boles <dboles src gnome org>]

commit e6bbc10bd590150be2d7c822d8bd116fd68115e8
Author: Daniel Boles <dboles src gnome org>
Date:   Fri Sep 1 20:17:11 2017 +0100

    ComboBox: Dodge possible surplus disconnects
    
    in case anyone connected any other signal on the model to this ComboBox.

 gtk/gtkcombobox.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkcombobox.c b/gtk/gtkcombobox.c
index 5e59260..c702529 100644
--- a/gtk/gtkcombobox.c
+++ b/gtk/gtkcombobox.c
@@ -1616,7 +1616,18 @@ gtk_combo_box_unset_model (GtkComboBox *combo_box)
 
   if (priv->model)
     {
-      g_signal_handlers_disconnect_by_data (priv->model, combo_box);
+      g_signal_handlers_disconnect_by_func (priv->model,
+                                            gtk_combo_box_model_row_inserted,
+                                            combo_box);
+      g_signal_handlers_disconnect_by_func (priv->model,
+                                            gtk_combo_box_model_row_deleted,
+                                            combo_box);
+      g_signal_handlers_disconnect_by_func (priv->model,
+                                            gtk_combo_box_model_rows_reordered,
+                                            combo_box);
+      g_signal_handlers_disconnect_by_func (priv->model,
+                                            gtk_combo_box_model_row_changed,
+                                            combo_box);
 
       g_object_unref (priv->model);
       priv->model = NULL;