FIX do not stop route_search too early

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@8290 8aca7d54-2c30-db11-9de9-000461428c89

simhalt.cc

@@ -1622,7 +1622,7 @@ void haltestelle_t::search_route_resumable(  ware_t &ware   )
 		// for all halts with halt_data.weight < explored_weight one of the best routes is found
 		const uint16 explored_weight = open_list.empty()  ? 65535u : open_list.front().aggregate_weight;
 
-		if (best_destination_weight <= explored_weight) {
+		if (best_destination_weight <= explored_weight  &&  best_destination_weight < 65535u) {
 			// we explored best route to this destination in last run
 			// (any other not yet explored connection will have larger weight)
 			// no need to search route for this ware