[gtk+] widget: Don't access highlight_resize in non-debug builds

[Timm Bäder <baedert src gnome org>]

commit 2cbcee854920c2b6a80a6e45da7a9469f4496f2f
Author: Timm Bäder <mail baedert org>
Date:   Fri Jul 28 21:28:32 2017 +0200

    widget: Don't access highlight_resize in non-debug builds
    
    The GtkWidgetPrivate struct only contains that member if G_ENABLE_DEBUG
    is defined.

 gtk/gtkwidget.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index a0da34d..76971de 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -15118,6 +15118,7 @@ gtk_widget_maybe_add_debug_render_nodes (GtkWidget             *widget,
         }
     }
 
+#ifdef G_ENABLE_DEBUG
   if (GTK_DISPLAY_DEBUG_CHECK (display, RESIZE) &&
       priv->highlight_resize)
     {
@@ -15135,6 +15136,7 @@ gtk_widget_maybe_add_debug_render_nodes (GtkWidget             *widget,
       priv->highlight_resize = FALSE;
       gtk_widget_queue_draw (widget);
     }
+#endif
 
   if (GTK_DISPLAY_DEBUG_CHECK (display, GEOMETRY))
     {