Preprocessor: forbid check and stoch_simul in block-decomposed mode with mfs > 0

Closes: #1726

matlab/dr_block.m

 function [dr,info,M_,options_,oo_] = dr_block(dr,task,M_,options_,oo_,varargin)
 % function [dr,info,M_,options_,oo_] = dr_block(dr,task,M_,options_,oo_,varargin)
-% computes the reduced form solution of a rational expectations model
+% computes the reduced form solution of a rational expectations block-decomposed model
 % (first order approximation of the stochastic model around the deterministic steady state).
 %
+% NB: This code does not work with option mfs > 0. The preprocessor has a check to avoid this
+%     configuration. See also #1726.
+%
 % INPUTS
 %   dr         [matlab structure] Decision rules for stochastic simulations.
 %   task       [integer]          if task = 0 then dr_block computes decision rules.

preprocessor @ 3c4d647c

-Subproject commit 7765efe95bff0d724ccbc97c0b3f543577395017
+Subproject commit 3c4d647cc33a14d3648ad0989557cf687a650487

tests/block_bytecode/lola_common.inc

@@ -716,13 +716,12 @@ tauc2=tauc;
 
 end;
 
-%========================================================
-% compute initial steady state and check eigenvalues 
-%========================================================
+%==============================
+% compute initial steady state
+%==============================
 
 resid;
 steady(solve_algo=3);
-check;
 
 @#if deterministic
 
@@ -930,13 +929,12 @@ tauw2=tauw;
 tauc2=tauc;
 end;
 
-%========================================================
-% compute final steady state and check eigenvalues 
-%========================================================
+%============================
+% compute final steady state
+%============================
 
 resid;
 steady(solve_algo=3);
-check;
 
 
 shocks;