Use new approach for setting aux variables in model inversion routine.

(cherry picked from commit f1ed81aa)

matlab/model_inversion.m

@@ -69,29 +69,7 @@ if exogenousvariables.vobs>constraints.vobs
 end
 
 % Add auxiliary variables in initialconditions object.
-for i=1:length(DynareModel.aux_vars)
-    if ~ismember(DynareModel.endo_names{DynareModel.aux_vars(i).endo_index}, initialconditions.name)
-        switch DynareModel.aux_vars(i).type
-          case 1 % lag on endogenous variable.
-            initialconditions{DynareModel.endo_names{DynareModel.aux_vars(i).endo_index}} = ...
-                initialconditions{DynareModel.endo_names{DynareModel.aux_vars(i).orig_index}}.lag(abs(DynareModel.aux_vars(i).orig_lead_lag));
-          case 8 % diff on endogenous variable.
-            initialconditions{DynareModel.endo_names{DynareModel.aux_vars(i).endo_index}} = ...
-                initialconditions{DynareModel.endo_names{DynareModel.aux_vars(i).orig_index}}.diff.lag(abs(DynareModel.aux_vars(i).orig_lead_lag));
-          case 3 % lag on exogenous variable.
-            initialconditions{DynareModel.endo_names{DynareModel.aux_vars(i).endo_index}} = ...
-                initialconditions{DynareModel.exo_names{DynareModel.aux_vars(i).orig_index}}.lag(abs(DynareModel.aux_vars(i).orig_lead_lag));
-          case 0 % lead on endogenous variable.
-            initialconditions{DynareModel.endo_names{DynareModel.aux_vars(i).endo_index}} = ...
-                initialconditions{DynareModel.endo_names{DynareModel.aux_vars(i).orig_index}}.lead(abs(DynareModel.aux_vars(i).orig_lead_lag));
-          case 2 % lead on exogenous variable.
-            initialconditions{DynareModel.endo_names{DynareModel.aux_vars(i).endo_index}} = ...
-                initialconditions{DynareModel.exo_names{DynareModel.aux_vars(i).orig_index}}.lead(abs(DynareModel.aux_vars(i).orig_lead_lag));
-          otherwise
-            error("This is a bug! PLease report to Dynare developpers.")
-        end
-    end
-end
+[initialconditions, info] = checkdatabase(initialconditions, DynareModel, true, false);
 
 % Get the list of endogenous and exogenous variables.
 endo_names = DynareModel.endo_names;