From 5198acfe22fd24b1e69924bec7dde99a061538be Mon Sep 17 00:00:00 2001
From: KUDr <KUDr@openttd.org>
Date: Fri, 2 Feb 2007 20:20:56 +0000
Subject: [PATCH] (svn r8540) -Fix[YAPF]: Assert when buoy is placed on NE or
 NW map edge (Dan)

---
 src/station_cmd.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/station_cmd.cpp b/src/station_cmd.cpp
index 0a6ff25527..6e3e1b4d19 100644
--- a/src/station_cmd.cpp
+++ b/src/station_cmd.cpp
@@ -2134,7 +2134,14 @@ static uint32 GetTileTrackStatus_Station(TileIndex tile, TransportType mode)
 
 		case TRANSPORT_WATER:
 			// buoy is coded as a station, it is always on open water
-			if (IsBuoy(tile)) return TRACK_BIT_ALL * 0x101;
+			if (IsBuoy(tile)) {
+				TrackBits ts = TRACK_BIT_ALL;
+				// remove tracks that connect NE map edge
+				if (TileX(tile) == 0) ts &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
+				// remove tracks that connect NW map edge
+				if (TileY(tile) == 0) ts &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
+				return uint32(ts) * 0x101;
+			}
 			break;
 
 		case TRANSPORT_ROAD: