[gnome-control-center] display: Fix compile warnings using g_clear_pointer

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 04b0b68be47dcecd65b26beffd347246f1ddbc6b
Author: Robert Ancell <robert ancell canonical com>
Date:   Wed Oct 17 09:16:50 2018 +1300

    display: Fix compile warnings using g_clear_pointer

 panels/display/cc-display-panel.c      | 2 +-
 panels/display/cc-night-light-widget.c | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/panels/display/cc-display-panel.c b/panels/display/cc-display-panel.c
index 8db886931..e1d2aa73c 100644
--- a/panels/display/cc-display-panel.c
+++ b/panels/display/cc-display-panel.c
@@ -272,7 +272,7 @@ cc_display_panel_dispose (GObject *object)
   g_clear_object (&self->shell_cancellable);
   g_clear_object (&self->shell_proxy);
 
-  g_clear_pointer (&self->night_light_dialog, gtk_widget_destroy);
+  g_clear_pointer ((GtkWidget **) &self->night_light_dialog, gtk_widget_destroy);
 
   G_OBJECT_CLASS (cc_display_panel_parent_class)->dispose (object);
 }
diff --git a/panels/display/cc-night-light-widget.c b/panels/display/cc-night-light-widget.c
index 8b5d60024..3c0e9d8a9 100644
--- a/panels/display/cc-night-light-widget.c
+++ b/panels/display/cc-night-light-widget.c
@@ -119,8 +119,8 @@ cc_night_light_widget_style_updated (GtkWidget *widget)
   CcNightLightWidget *self = CC_NIGHT_LIGHT_WIDGET (widget);
   GtkIconTheme *icon_theme = gtk_icon_theme_get_default ();
 
-  g_clear_pointer (&self->surface_sunrise, (GDestroyNotify) cairo_surface_destroy);
-  g_clear_pointer (&self->surface_sunset, (GDestroyNotify) cairo_surface_destroy);
+  g_clear_pointer (&self->surface_sunrise, cairo_surface_destroy);
+  g_clear_pointer (&self->surface_sunset, cairo_surface_destroy);
 
   self->surface_sunrise =
     gtk_icon_theme_load_surface (icon_theme, "daytime-sunrise-symbolic",
@@ -152,8 +152,8 @@ cc_night_light_widget_finalize (GObject *object)
 {
   CcNightLightWidget *self = CC_NIGHT_LIGHT_WIDGET (object);
 
-  g_clear_pointer (&self->surface_sunrise, (GDestroyNotify) cairo_surface_destroy);
-  g_clear_pointer (&self->surface_sunset, (GDestroyNotify) cairo_surface_destroy);
+  g_clear_pointer (&self->surface_sunrise, cairo_surface_destroy);
+  g_clear_pointer (&self->surface_sunset, cairo_surface_destroy);
 
   G_OBJECT_CLASS (cc_night_light_widget_parent_class)->finalize (object);
 }