From 45b16ad0c9a1ee8180f8178e85e79fca2a00788d Mon Sep 17 00:00:00 2001
From: david <david>
Date: Tue, 22 Jul 2003 02:05:50 +0000
Subject: [PATCH] Eliminate divide-by-zero error.  AI should spin down
 gradually again.

---
 src/Systems/vacuum.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Systems/vacuum.cxx b/src/Systems/vacuum.cxx
index 5244a4e7b..3e6311d60 100644
--- a/src/Systems/vacuum.cxx
+++ b/src/Systems/vacuum.cxx
@@ -55,7 +55,7 @@ VacuumSystem::update (double dt)
 
         // simple regulator model that clamps smoothly to about 5 inhg
         // over a normal rpm range
-        double max = 5.39 - 1.0 / ( rpm * 0.00111 );
+        double max = (rpm > 0 ? 5.39 - 1.0 / ( rpm * 0.00111 ) : 0);
         if ( suction < 0.0 ) suction = 0.0;
         if ( suction > max ) suction = max;
     }
-- 
2.39.5