[mutter] wayland/actor-surface-role: Check for toplevel window

[Jonas Ådahl <jadahl src gnome org>]

commit 43151edecef50f3549c72931bf6534432c4394cc
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri Aug 19 15:15:27 2016 +0800

    wayland/actor-surface-role: Check for toplevel window
    
    Don't check whether the surface of the role has a window, but whether
    the corresponding toplevel surface has a window. This is necessary to
    make subsurfaces not always early out.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=770131

 src/wayland/meta-wayland-surface.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/wayland/meta-wayland-surface.c b/src/wayland/meta-wayland-surface.c
index 5ce2b39..77fbed3 100644
--- a/src/wayland/meta-wayland-surface.c
+++ b/src/wayland/meta-wayland-surface.c
@@ -1999,10 +1999,12 @@ actor_surface_commit (MetaWaylandSurfaceRole  *surface_role,
 {
   MetaWaylandSurface *surface =
     meta_wayland_surface_role_get_surface (surface_role);
+  MetaWaylandSurface *toplevel_surface;
 
   queue_surface_actor_frame_callbacks (surface, pending);
 
-  if (!surface->window)
+  toplevel_surface = meta_wayland_surface_get_toplevel (surface);
+  if (!toplevel_surface || !toplevel_surface->window)
     return;
 
   meta_surface_actor_wayland_sync_state (