wayland/subsurface: Add check for parent surface
Just as we do in similar places. This avoids crashes under certain circumstances. https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1411
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@ -275,7 +275,8 @@ meta_wayland_subsurface_notify_subsurface_state_changed (MetaWaylandSurfaceRole
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meta_wayland_surface_role_get_surface (surface_role);
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MetaWaylandSurface *parent = surface->sub.parent;
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return meta_wayland_surface_notify_subsurface_state_changed (parent);
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if (parent)
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return meta_wayland_surface_notify_subsurface_state_changed (parent);
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}
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static double
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