From b4134de55086af423ab9f148b7203e854ce296f7 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Fri, 24 Aug 2012 14:56:28 +1000
Subject: [PATCH] APM: ensure fence_total is positive

thanks to David Buzz for the suggestion
---
 ArduPlane/geofence.pde | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ArduPlane/geofence.pde b/ArduPlane/geofence.pde
index 406d3fd5a1..7e9d4e7e34 100644
--- a/ArduPlane/geofence.pde
+++ b/ArduPlane/geofence.pde
@@ -89,6 +89,10 @@ static void geofence_load(void)
         }
     }
 
+    if (g.fence_total < 0) {
+        g.fence_total.set(0);
+    }
+
     for (i=0; i<g.fence_total; i++) {
         geofence_state->boundary[i] = get_fence_point_with_index(i);
     }