[gtk] a11y: We can peek here

[Benjamin Otte <otte src gnome org>]

commit 336d652be547b7548dc3e6b6760c318768998dd7
Author: Benjamin Otte <otte redhat com>
Date:   Sun Dec 8 06:26:58 2019 +0100

    a11y: We can peek here
    
    Avoids instantiating a11y objects when we don't need to.

 gtk/a11y/gtktreeviewaccessible.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/gtk/a11y/gtktreeviewaccessible.c b/gtk/a11y/gtktreeviewaccessible.c
index 2e7a67fb7f..eb9e6032e8 100644
--- a/gtk/a11y/gtktreeviewaccessible.c
+++ b/gtk/a11y/gtktreeviewaccessible.c
@@ -1730,7 +1730,9 @@ _gtk_tree_view_accessible_changed (GtkTreeView   *treeview,
   GtkTreeViewAccessible *accessible;
   guint i;
 
-  accessible = GTK_TREE_VIEW_ACCESSIBLE (gtk_widget_get_accessible (GTK_WIDGET (treeview)));
+  accessible = GTK_TREE_VIEW_ACCESSIBLE (_gtk_widget_peek_accessible (GTK_WIDGET (treeview)));
+  if (accessible == NULL)
+    return;
 
   for (i = 0; i < gtk_tree_view_get_n_columns (treeview); i++)
     {