[mutter/gnome-3-34] wayland/actor-surface: Always consider unmapped actors not on output

[Jonas Ådahl <jadahl src gnome org>]

commit a9a011081826e76799361d7e5aa64eec6e8a3c55
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri Dec 6 22:20:45 2019 +0100

    wayland/actor-surface: Always consider unmapped actors not on output
    
    This avoids using bogus geometric values from an unmapped actor to
    determine whether an actor is on a logical monitor or not. This would
    happen when committing to a subsurface of a yet to be mapped toplevel.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/961
    (cherry picked from commit 6d15231f10a22ee96f32dee9df8db8296c73376f)

 src/wayland/meta-wayland-actor-surface.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/wayland/meta-wayland-actor-surface.c b/src/wayland/meta-wayland-actor-surface.c
index cdcc6b1ca..13f13bcf6 100644
--- a/src/wayland/meta-wayland-actor-surface.c
+++ b/src/wayland/meta-wayland-actor-surface.c
@@ -292,6 +292,9 @@ meta_wayland_actor_surface_is_on_logical_monitor (MetaWaylandSurfaceRole *surfac
   MetaRectangle logical_monitor_layout;
   gboolean is_on_monitor;
 
+  if (!clutter_actor_is_mapped (actor))
+    return FALSE;
+
   clutter_actor_get_transformed_position (actor, &x, &y);
   clutter_actor_get_transformed_size (actor, &width, &height);