From a301c87c1d0b1905359366371e93c0815f99e507 Mon Sep 17 00:00:00 2001
From: Matteo Cypriani <matteo.cypriani@univ-fcomte.fr>
Date: Tue, 23 Aug 2011 09:43:57 +0200
Subject: [PATCH] [Positioning] Fix segfault when ignoring AP RP

This commit fixes a segfault that occurred in certain circumstances with
the option positioning.radar-ignore-ap-reference-points activated. The
bug was introduced with this option in 0da98cdb.
---
 owlps-positioning/src/stock.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/owlps-positioning/src/stock.cc b/owlps-positioning/src/stock.cc
index e258180..5b7d7a4 100644
--- a/owlps-positioning/src/stock.cc
+++ b/owlps-positioning/src/stock.cc
@@ -678,7 +678,10 @@ closest_calibration_request(const Request &request)
       // No non-AP reference point was found, we are forced to consider
       // the AP reference points
       if (i == calibration_requests.end())
-        ignore_aps = false ;
+        {
+          i = calibration_requests.begin() ;
+          ignore_aps = false ;
+        }
     }
 
   float distance = i->ss_square_distance(request) ;