From 4f394f6a636c9bbba637efe2e53c3e6b329bdf8f Mon Sep 17 00:00:00 2001
From: peter1138 <peter1138@openttd.org>
Date: Thu, 19 Jan 2006 18:33:20 +0000
Subject: [PATCH] (svn r3410) - NewGRF fix: Only add a random number of days to
 an engine's base introduction date if that date is not 0.

---
 engine.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/engine.c b/engine.c
index 56693a00ce..b845934a7e 100644
--- a/engine.c
+++ b/engine.c
@@ -210,7 +210,7 @@ void StartupEngines(void)
 		e->player_avail = 0;
 
 		r = Random();
-		e->intro_date = GB(r, 0, 9) + ei->base_intro;
+		e->intro_date = ei->base_intro == 0 ? 0 : GB(r, 0, 9) + ei->base_intro;
 		if (e->intro_date <= _date) {
 			e->age = (_date - e->intro_date) >> 5;
 			e->player_avail = (byte)-1;