Fix saving of _mh_mode after integration of SMC
60c0ed01 changed the behavior of compute_mh_covariance_matrix
to not save the _mh_mode.mat
file. That is now done in compute_posterior_covariance_matrix
. This breaks backward compatibility as e.g. fs2000.mod
now does not save the _mh_mode.mat
anymore via the call to marginal_density.m
.