From aa58d5c7614ad3c13d2d438a4e0767df2645e7fe Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Thu, 12 Nov 2015 00:10:40 +0000
Subject: [PATCH] Fix for determining towered vs untowered airports.

---
 src/Airports/airport.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Airports/airport.cxx b/src/Airports/airport.cxx
index 4b0270ea9..c20a96d44 100644
--- a/src/Airports/airport.cxx
+++ b/src/Airports/airport.cxx
@@ -684,7 +684,8 @@ void FGAirport::validateTowerData() const
     // offset the tower position away from the runway centerline, if
     // airport has a single runway. Offset by eight times the runway width,
     // an entirely guessed figure.
-    if (numRunways() <= 2) {
+    int runwayCount = numRunways();
+    if ((runwayCount > 0) && (runwayCount <= 2)) {
         FGRunway* runway = getRunwayByIndex(0);
         double hdg = runway->headingDeg() + 90;
         mTowerPosition = SGGeodesy::direct(geod(), hdg, runway->widthM() * 8);
-- 
2.39.5