[gnome-panel] notification-area: fix try icons when compositing is off

[Alberts Muktupāvels <muktupavels src gnome org>]

commit e73b4a9cbb88d5fb6797efc409c494e0f53ac179
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Oct 8 20:19:11 2017 +0300

    notification-area: fix try icons when compositing is off
    
    This reverts commit 06e938f808043a51f3d71ef701e9e48111f73307.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=788109

 modules/notification-area/na-tray-child.c   |    3 ++-
 modules/notification-area/na-tray-manager.c |    2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/modules/notification-area/na-tray-child.c b/modules/notification-area/na-tray-child.c
index 364f0d4..c46509a 100644
--- a/modules/notification-area/na-tray-child.c
+++ b/modules/notification-area/na-tray-child.c
@@ -288,7 +288,8 @@ na_tray_child_new (GdkScreen *screen,
   depth = gdk_visual_get_depth (visual);
 
   visual_has_alpha = red_prec + blue_prec + green_prec < depth;
-  child->has_alpha = (visual_has_alpha && gdk_screen_is_composited (screen));
+  child->has_alpha = (visual_has_alpha &&
+                      gdk_display_supports_composite (gdk_screen_get_display (screen)));
 
   child->composited = child->has_alpha;
 
diff --git a/modules/notification-area/na-tray-manager.c b/modules/notification-area/na-tray-manager.c
index 58b91b5..747e4c3 100644
--- a/modules/notification-area/na-tray-manager.c
+++ b/modules/notification-area/na-tray-manager.c
@@ -622,7 +622,7 @@ na_tray_manager_set_visual_property (NaTrayManager *manager)
                                                       "_NET_SYSTEM_TRAY_VISUAL");
 
   if (gdk_screen_get_rgba_visual (manager->screen) != NULL &&
-      gdk_screen_is_composited (manager->screen))
+      gdk_display_supports_composite (display))
     xvisual = GDK_VISUAL_XVISUAL (gdk_screen_get_rgba_visual (manager->screen));
   else
     {