Simplify and fix notifier removal on error.

This factors out the common logic to run over all ZMQ notifiers, call a
function on them, and remove them from the list if the function fails is
extracted to a helper method.

Note that this also fixes a potential memory leak:  When a notifier was
removed previously after its callback returned false, it would just be
removed from the list without destructing the object.  This is now done
correctly by std::unique_ptr behind the scenes.

0 files changed, 0 insertions, 0 deletions