endogenous prior: fix logic of missing observations check

Message should only be displayed if there are missing observations

matlab/dynare_estimation_init.m

@@ -532,6 +532,7 @@ end
 if ~isempty(dataset_)
     options_.nobs = dataset_.nobs;
     if options_.endogenous_prior 
+        if ~isnan(dataset_info.missing.number_of_observations) && ~(dataset_info.missing.number_of_observations==0) %missing observations present
             if dataset_info.missing.no_more_missing_observations<dataset_.nobs-10
                 fprintf('\ndynare_estimation_init: There are missing observations in the data.\n')
                 fprintf('dynare_estimation_init: I am computing the moments for the endogenous prior only\n')
@@ -544,6 +545,7 @@ if ~isempty(dataset_)
             end
         end
     end
+end
 
 % setting steadystate_check_flag option
 if options_.diffuse_filter || options_.steadystate.nocheck