Fix task Area selction after removing one

jm2l/views.py

@@ -430,7 +430,7 @@ def tasks(request):
             DBSession.add(Task)
         DBSession.flush()
         return HTTPFound(location=request.route_url('list_task')+"#"+slugify(Task.area.name))
-    return {'form':form, 'area':slugify(Areas[Task.area_uid-1].name)}
+    return {'form':form, 'area':slugify(Task.area.name)}
 
 @view_config(route_name='handle_pole', renderer='jm2l:templates/Staff/pole.mako')
 def tasks_area(request):