From 0f2130730bd68a76719450c03c0f336c1254a5ca Mon Sep 17 00:00:00 2001
From: Andreas Schneider <aksdb@gmx.de>
Date: Thu, 3 Dec 2009 15:38:11 +0100
Subject: [PATCH] - Fixed UpdateSortOrder to handle off-screen updates
 correctly

---
 Client/ULandscape.pas | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Client/ULandscape.pas b/Client/ULandscape.pas
index 8c76d70..149ba3a 100644
--- a/Client/ULandscape.pas
+++ b/Client/ULandscape.pas
@@ -1421,7 +1421,8 @@ begin
     current := current^.Next;
   end;
 
-  if oldNode <> newNodePosition then
+  //oldNode = nil, if the change happend out-of-screen
+  if (oldNode <> nil ) and (oldNode <> newNodePosition) then
   begin
     if oldNodePrev <> oldNode then
     begin