Fix calib_smoother (enforce order=1)

doc/dynare.texi

@@ -4542,7 +4542,8 @@ This command computes the smoothed variables (and possible the filtered
 variables) on a @code{calibrated} model.
 
 A datafile must be provided, and the observable variables declared with
-@code{varobs}.
+@code{varobs}. The smoother is based on a first-order approximation of
+the model.
 
 @vindex oo_.SmoothedVariables
 @vindex oo_.SmoothedShocks

preprocessor/ComputingTasks.cc

@@ -2332,5 +2332,6 @@ CalibSmootherStatement::writeOutput(ostream &output, const string &basename) con
   symbol_list.writeOutput("var_list_", output);
   output << "options_.mode_compute = 0;" << endl
          << "options_.smoother = 1;" << endl
+         << "options_.order = 1;" << endl
          << "dynare_estimation(var_list_);" << endl;
 }