[Positioning] Debug checks for CR deletion

Add asserts and debug messages in ReferencePoint::delete_requests() and
Stock::delete_calibration_request().

owlps-positioning/src/referencepoint.cc

@@ -113,10 +113,17 @@ get_requests(const string &mac_transmitter) const
  */
 void ReferencePoint::delete_requests()
 {
+#ifndef NDEBUG
+  int stock_nb_requests = Stock::nb_calibration_requests() ;
+#endif // NDEBUG
+
   for (vector<CalibrationRequest*>::iterator i = requests.begin() ;
        i != requests.end() ; ++i)
     Stock::delete_calibration_request(**i) ;
 
+  assert(Stock::nb_calibration_requests() ==
+         stock_nb_requests - requests.size()) ;
+
   requests.clear() ;
 }
 

owlps-positioning/src/stock.cc

@@ -374,6 +374,18 @@ store_calibration_request(const CalibrationRequest &request)
 void Stock::
 delete_calibration_request(const CalibrationRequest &request)
 {
+#ifndef NDEBUG
+  unordered_set<CalibrationRequest>::const_iterator found =
+    calibration_requests.find(request) ;
+  if (found == calibration_requests.end())
+    {
+      cerr
+          << "Error! Cannot delete an unstored CalibrationRequest: "
+          << request << endl ;
+      return ;
+    }
+#endif // NDEBUG
+
   calibration_requests.erase(request) ;
 }