fix(sleepers): the timbers a switch shares with a track with no model of timbers of its own laid of the model of the switch, not of the one of eu07.ini without the fastenings: the model of a track with none of its own that of the tracks most of its timbers carry with one, and a timber carrying none of them, as under the short tracks between the halves of a slip, of the model of the nearest timber with one up to 1.5 m away; the fastenings and checkseats selftests take the model the same way

world/TrackSleepers.cpp

@@ -319,6 +319,7 @@ void lay( TTrack &Track, bool const Fastened ) {
     laid.laying = true;
     auto beams { in_background() ? std::move( placed ) : place( Track ) };
     laid.laying = false;
+    laid.timbers = timber_model( Track, beams );
     // the layout of the cluster isn't needed by this track any more, the instances below are what's drawn
     forget_layout( Track );
     instance( Track, std::move( beams ), Fastened );