From c41bf4b468d3967211e43ca5dbc3a090ae7447e3 Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Wed, 12 Apr 2017 19:19:07 +0100
Subject: [PATCH] Viewport order lines refresh fix for re-displaying previous
 orders.

---
 src/viewport.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/viewport.cpp b/src/viewport.cpp
index 731412d524..d12bba4cfa 100644
--- a/src/viewport.cpp
+++ b/src/viewport.cpp
@@ -1735,6 +1735,7 @@ static void ViewportMapDrawVehicleRoute(const ViewPort *vp)
 			// make sure we remove any leftover paths
 			MarkRoutePathsDirty(_vp_route_paths);
 			_vp_route_paths.clear();
+			_vp_route_paths_last_mark_dirty.clear();
 			DEBUG(misc, 1, "ViewportMapDrawVehicleRoute: redrawing dirty paths 0");
 		}
 		return;