[gtk] widget: Directly access priv pointer in even controller API

[Timm Bäder <baedert src gnome org>]

commit af27199102ac98ee170f8f4af2e415ce11e95310
Author: Timm Bäder <mail baedert org>
Date:   Wed May 2 19:57:36 2018 +0200

    widget: Directly access priv pointer in even controller API
    
    Spares us a few lines.

 gtk/gtkwidget.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 58a8379aac..15c8384bbf 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -12903,15 +12903,13 @@ void
 gtk_widget_add_controller (GtkWidget          *widget,
                            GtkEventController *controller)
 {
-  GtkWidgetPrivate *priv;
+  GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
   EventControllerData *data;
 
   g_return_if_fail (GTK_IS_WIDGET (widget));
   g_return_if_fail (GTK_IS_EVENT_CONTROLLER (controller));
   g_return_if_fail (gtk_event_controller_get_widget (controller) == NULL);
 
-  priv = widget->priv;
-
   GTK_EVENT_CONTROLLER_GET_CLASS (controller)->set_widget (controller, widget);
 
   data = g_new0 (EventControllerData, 1);
@@ -12948,16 +12946,14 @@ void
 gtk_widget_remove_controller (GtkWidget          *widget,
                               GtkEventController *controller)
 {
+  GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
   EventControllerData *data = NULL;
-  GtkWidgetPrivate *priv;
   GList *l;
 
   g_return_if_fail (GTK_IS_WIDGET (widget));
   g_return_if_fail (GTK_IS_EVENT_CONTROLLER (controller));
   g_return_if_fail (gtk_event_controller_get_widget (controller) == widget);
 
-  priv = widget->priv;
-
   for (l = priv->event_controllers; l; l = l->next)
     {
       data = l->data;