surface-actor-wayland: Fix assumption in get_current_primary_view

Unlike the multi-view path, the optimized/single-view one doesn't check
if the surface-actor is really present on the view. That is the case
whenever it's hidden - e.g. when the window is minimized.

Fixes 3b7137cb359

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2662>

src/compositor/meta-surface-actor-wayland.c

@@ -99,7 +99,9 @@ meta_surface_actor_wayland_get_current_primary_view (MetaSurfaceActor *actor,
             }
           else
             {
-              if (meta_surface_actor_is_obscured (actor))
+              if (meta_surface_actor_is_obscured (actor) ||
+                  !clutter_actor_is_effectively_on_stage_view (CLUTTER_ACTOR (actor),
+                                                               stage_view))
                 continue;
             }
         }