From cb9d0c69d1fac53c479b678741f82df084b1b5ba Mon Sep 17 00:00:00 2001
From: rubidium <rubidium@openttd.org>
Date: Sat, 4 Aug 2007 01:25:44 +0000
Subject: (svn r10780) -Fix: assertion when opening the advanced vehicle list
 with the shortcut when being a spectator.

---
 src/group_gui.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/group_gui.cpp b/src/group_gui.cpp
index 95708ed3a..3e6edc820 100644
--- a/src/group_gui.cpp
+++ b/src/group_gui.cpp
@@ -780,6 +780,8 @@ static const WindowDesc _group_desc = {
 
 void ShowPlayerGroup(PlayerID player, VehicleType vehicle_type)
 {
+	if (!IsValidPlayer(player)) return;
+
 	WindowClass wc;
 
 	switch (vehicle_type) {
-- 
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