[gtk+] widget: Fix UPDATES debug rendering

[Timm Bäder <baedert src gnome org>]

commit a23ea01c8fa0622df76eb35ac21a01fd0ef1af79
Author: Timm Bäder <mail baedert org>
Date:   Wed Aug 23 13:58:21 2017 +0200

    widget: Fix UPDATES debug rendering
    
    Choose the right widget to add the debug updates to (the one with the
    window) and the correct region (the one in that window's coordinates).

 gtk/gtkwidget.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 96b9c98..b2e13df 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -5295,7 +5295,7 @@ gtk_widget_queue_draw_region (GtkWidget            *widget,
   cairo_region_translate (region2, x, y);
 
 invalidate:
-  gtk_debug_updates_add (widget, region);
+  gtk_debug_updates_add (parent, region2);
   gdk_window_invalidate_region (_gtk_widget_get_window (widget), region2, TRUE);
 
   cairo_region_destroy (region2);