[gtk] text view: Fix selection bubble handling

[Matthias Clasen <matthiasc src gnome org>]

commit 67c82e8bd9f75d36bda1d293dfe19adc1d98d9fe
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jun 10 21:39:14 2019 +0000

    text view: Fix selection bubble handling
    
    We can't call gtk_widget_destroy on something
    that wasn't added as a child to a container -
    it ends up calling gtk_container_remove, which
    asserts if it doesn't find the child.

 gtk/gtktextview.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtktextview.c b/gtk/gtktextview.c
index 865b300049..6e87b25f23 100644
--- a/gtk/gtktextview.c
+++ b/gtk/gtktextview.c
@@ -3635,8 +3635,7 @@ gtk_text_view_finalize (GObject *object)
   if (priv->bottom_window)
     text_window_free (priv->bottom_window);
 
-  if (priv->selection_bubble)
-    gtk_widget_destroy (priv->selection_bubble);
+  g_clear_pointer (&priv->selection_bubble, gtk_widget_unparent);
 
   if (priv->magnifier_popover)
     gtk_widget_destroy (priv->magnifier_popover);
@@ -8796,8 +8795,7 @@ gtk_text_view_selection_bubble_popup_show (gpointer user_data)
   all_selected = gtk_text_iter_equal (&start, &sel_start) &&
                  gtk_text_iter_equal (&end, &sel_end);
 
-  if (priv->selection_bubble)
-    gtk_widget_destroy (priv->selection_bubble);
+  g_clear_pointer (&priv->selection_bubble, gtk_widget_unparent);
 
   priv->selection_bubble = gtk_popover_new (GTK_WIDGET (text_view));
   gtk_style_context_add_class (gtk_widget_get_style_context (priv->selection_bubble),