preprocessor: always create a dynamic model file, even when there is no Dynare command needing it

git-svn-id: https://www.dynare.org/svn/dynare/trunk@3126 ac1d8469-bf42-47a9-8791-bf33cf982152

ModFile.cc

@@ -365,8 +365,8 @@ ModFile::writeOutputFiles(const string &basename, bool clear_all) const
         }
       else
         {
-          /*dynamic_model.writeDynamicFile(basename, false, false, false);
-          dynamic_model.writeParamsDerivativesFile(basename);*/
+          dynamic_model.writeDynamicFile(basename, false, false, false);
+          dynamic_model.writeParamsDerivativesFile(basename);
         }
     }