Fix compatibility of sensitivity and ML estimation

See http://www.dynare.org/phpBB3/viewtopic.php?f=1&t=5681 Email to Marco:

There is an obvious bug in set_shocks_param.m. Sigma_e_ should be just Sigma_e. But there seems to be more. In stab_map_.m in

    if pprior,
        for j=1:nshock,
            if opt_gsa.morris~=1,
                lpmat0(:,j) = randperm(Nsam)'./(Nsam+1); %latin hypercube
            end
            if opt_gsa.prior_range
lpmat0(:,j)=lpmat0(:,j).*(bayestopt_.ub(j)-bayestopt_.lb(j))+bayestopt_.lb(j);
            end
        end

bayestopt_.ub and lb are accessed and they are Inf. lpmat0 then has a bunch of NaNs that should not be there. This seems to be due to ML estimation and should probably be filtered out.