Fix bug in dsge_var_likelihood.m where constant was not considered for dof...

Fix bug in dsge_var_likelihood.m where constant was not considered for dof when Gamma function was computed

Does not affect the maximum of the posterior as it only affects constant term

matlab/dsge_var_likelihood.m

@@ -248,10 +248,10 @@ if ~isinf(dsge_prior_weight)% Evaluation of the likelihood of the dsge-var model
     PHI_tilde = tmp2*tmp1';                                                   %formula (28), DS (2004)
     clear('tmp1');
     prodlng1 = sum(gammaln(.5*((1+dsge_prior_weight)*NumberOfObservations- ...
-                               NumberOfObservedVariables*NumberOfLags ...
+                               NumberOfParameters ...
                                +1-(1:NumberOfObservedVariables)')));    %last term in numerator of third line of (A.2), DS (2004)
     prodlng2 = sum(gammaln(.5*(dsge_prior_weight*NumberOfObservations- ...
-                               NumberOfObservedVariables*NumberOfLags ...
+                               NumberOfParameters ...
                                +1-(1:NumberOfObservedVariables)')));    %last term in denominator of third line of (A.2), DS (2004)
     %Compute minus log likelihood according to (A.2), DS (2004)
     lik = .5*NumberOfObservedVariables*log(det(dsge_prior_weight*NumberOfObservations*GXX+mXX)) ... %first term in numerator of second line of (A.2), DS (2004)