Fix bug in contemp_reduced_form of SBVAR
As outlined in https://forum.dynare.org/t/different-results-of-a0-using-sbvar/15359 the attached codes crashes due to non-conformable matrices.
As outlined in https://forum.dynare.org/t/different-results-of-a0-using-sbvar/15359 the attached codes crashes due to non-conformable matrices.