[Positioning] Result::to_csv(): include area

Add the area in which is the result's coordinate, after the error.
This changes the behaviour of OutputUDP and OutputCSV.

owlps-positioning/TODO

@@ -35,7 +35,6 @@
    .   Area: p_min et p_max −> coord_min et coord_max
 
 - User interface
-   ° Add the area to the result in OutputCSV.
    ° When reading the APs, add them to the mobiles' list (or another
    way to be able to have a single entry for an AP).
    ° Review the option names & descriptions.

owlps-positioning/src/outputtcpsocketevaal.cc

@@ -97,7 +97,7 @@ void OutputTCPSocketEvAAL::write(const Result &result)
 int OutputTCPSocketEvAAL::
 area_of_interest_number(const Point3D &position) const
 {
-  const Area *area = Stock::in_which_area_is(position) ;
+  const Area *const area = Stock::in_which_area_is(position) ;
   if (area == NULL)
     return 0 ;
 

owlps-positioning/src/result.cc

@@ -88,7 +88,12 @@ const string Result::to_csv() const
       << ';' << position.get_y()
       << ';' << position.get_z()
       << ';' << "Error"
-      << ';' << error ;
+      << ';' << error
+      << ';' ;
+
+  const Area *const area = Stock::in_which_area_is(position) ;
+  if (area != NULL)
+    csv_line << area->get_name() ;
 
   return csv_line.str() ;
 }