From c61b617a169d2e98648f11288e45bab0080d9cc5 Mon Sep 17 00:00:00 2001
From: tron <tron@openttd.org>
Date: Mon, 19 Jun 2006 09:40:08 +0000
Subject: [PATCH] (svn r5314) -Regression: When road works started on a road
 tile with barren roadside the road side turned into trees (caused by r4258)

---
 road_map.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/road_map.h b/road_map.h
index f725d65fe3..73d386cb14 100644
--- a/road_map.h
+++ b/road_map.h
@@ -143,7 +143,11 @@ static inline void StartRoadWorks(TileIndex t)
 {
 	assert(!HasRoadWorks(t));
 	/* Remove any trees or lamps in case or roadwork */
-	SetGroundType(t, (RoadGroundType)(min(GetGroundType(t), RGT_PAVED) + RGT_ROADWORK_OFFSET));
+	switch (GetGroundType(t)) {
+		case RGT_BARREN:
+		case RGT_GRASS:  SetGroundType(t, RGT_ROADWORK_GRASS); break;
+		default:         SetGroundType(t, RGT_ROADWORK_PAVED); break;
+	}
 }
 
 static inline void TerminateRoadWorks(TileIndex t)