[gtk] widget: Avoid some more ->priv accesses

[Timm Bäder <baedert src gnome org>]

commit 481a78eee7c9922e252f0a6dd352f9a5fe165fe4
Author: Timm Bäder <mail baedert org>
Date:   Thu Oct 18 12:00:47 2018 +0200

    widget: Avoid some more ->priv accesses

 gtk/gtkwidget.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index c8aba33e8c..0ca54c1b3f 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -7974,7 +7974,11 @@ gtk_widget_get_ancestor (GtkWidget *widget,
   g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
 
   while (widget && !g_type_is_a (G_OBJECT_TYPE (widget), widget_type))
-    widget = widget->priv->parent;
+    {
+      GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
+
+      widget = priv->parent;
+    }
 
   return widget;
 }
@@ -8019,9 +8023,12 @@ gtk_widget_is_ancestor (GtkWidget *widget,
 
   while (widget)
     {
-      if (widget->priv->parent == ancestor)
-       return TRUE;
-      widget = widget->priv->parent;
+      GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
+
+      if (priv->parent == ancestor)
+        return TRUE;
+
+      widget = priv->parent;
     }
 
   return FALSE;