Fix order of checks for ramsey_constraints
The file Jung2005_Occbinding.mod triggers
Starting Dynare (version 5.1).
Calling Dynare with arguments: none
Starting preprocessing of the model file ...
ramsey_constraints: can only be used with ramsey_model or ramsey_policy
Ramsey Problem: added 3 Multipliers.
Apparently the check for the presence of ramsey_model
triggered by ramsey_constraints
is done before evaluating the whole file.