From fc095c70619750954f2ce300f25e99a50f1c58c3 Mon Sep 17 00:00:00 2001
From: curt <curt>
Date: Mon, 3 Feb 2003 21:57:25 +0000
Subject: [PATCH] Avoid a potential segfault.

---
 src/FDM/flight.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/FDM/flight.cxx b/src/FDM/flight.cxx
index a36163470..567190ea1 100644
--- a/src/FDM/flight.cxx
+++ b/src/FDM/flight.cxx
@@ -490,7 +490,9 @@ void FGInterface::_updateGeodeticPosition( double lat, double lon, double alt )
     _set_Geodetic_Position( lat, lon, alt );
 
     _set_Sea_level_radius( sl_radius * SG_METER_TO_FEET );
-    _set_Runway_altitude( getACModel()->get3DModel()->getFGLocation()->get_cur_elev_m() * SG_METER_TO_FEET );
+    if ( getACModel() != NULL ) {
+        _set_Runway_altitude( getACModel()->get3DModel()->getFGLocation()->get_cur_elev_m() * SG_METER_TO_FEET );
+    }
 
     _set_sin_lat_geocentric( lat_geoc );
     _set_cos_lat_geocentric( lat_geoc );
-- 
2.39.2