if (! weightsystems_equal(remember_ws, master->weightsystem) &&
(no_weightsystems(dive->weightsystem) ||
weightsystems_equal(dive->weightsystem, remember_ws)))
if (! weightsystems_equal(remember_ws, master->weightsystem) &&
(no_weightsystems(dive->weightsystem) ||
weightsystems_equal(dive->weightsystem, remember_ws)))