From e1ee952b8543842b2ba34a094c98f5c950937151 Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Sun, 12 Feb 2017 12:17:43 +0000
Subject: [PATCH] Fix crash when updating infrastructure totals when deleting
 bridge with signals.

---
 src/tunnelbridge_cmd.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tunnelbridge_cmd.cpp b/src/tunnelbridge_cmd.cpp
index 2620fe6572..5d79e5bf35 100644
--- a/src/tunnelbridge_cmd.cpp
+++ b/src/tunnelbridge_cmd.cpp
@@ -1881,7 +1881,7 @@ static void ChangeTileOwner_TunnelBridge(TileIndex tile, Owner old_owner, Owner
 	if (IsTunnelBridgeWithSignalSimulation(tile) && IsTunnelBridgeSignalSimulationEntrance(tile)) {
 		uint num_sigs = GetTunnelBridgeSignalSimulationSignalCount(tile, other_end);
 		Company::Get(old_owner)->infrastructure.signal -= num_sigs;
-		Company::Get(new_owner)->infrastructure.signal += num_sigs;
+		if (new_owner != INVALID_OWNER) Company::Get(new_owner)->infrastructure.signal += num_sigs;
 	}
 
 	if (new_owner != INVALID_OWNER) {