message: log: Fix Python binding compilation.
  This is probably not functional, but it should at least unlock
  the CI. I might consider dropping that code instead of fixing
  it.
diff: @@ -32,12 +32,10 @@ static
  void
  set_logger(boost::python::object& object)
  {
  - elle::generic_unique_ptr<elle::log::Logger> logger(
  - boost::python::extract<elle::log::Logger*>(object),
  - [] (elle::log::Logger*)
  - {
  - /* The logger will be deleted by python itself upon exit */
  - });
  + // This will, I think, cause a double free: since the logger is a Python
  + // object, it will be freed at the end by cpython too.
  + auto logger = std::unique_ptr<elle::log::Logger>(
  + boost::python::extract<elle::log::Logger*>(object));
  boost::python::incref(object.ptr());
  elle::log::logger(std::move(logger));
  }
  @@ -66,7 +64,7 @@ public:
  void
  enter()
  {
  - this->_indent();
  + this->_indent("FIXME");
  }
  void
  