Added output to get_prior_info (non empty iff info=1).

matlab/get_prior_info.m

-function get_prior_info(info,plt_flag)
+function results = get_prior_info(info,plt_flag)
 % Computes various prior statistics.
 %
 % INPUTS
@@ -37,6 +37,9 @@ if nargin==1
     plt_flag = 1;
 end
 
+% Initialize returned variable.
+results = [];
+
 changed_qz_criterium_flag  = 0;
 if isempty(options_.qz_criterium)
     options_.qz_criterium = 1+1e-9;