ms-sbvar bug fix: store no_create_init as number instead of string

(cherry picked from commit 868afeb9)

matlab/ms-sbvar/ms_estimation.m

@@ -41,6 +41,12 @@ if options_.ms.create_init
     clean_ms_estimation_files(options_.ms.file_tag);
     clean_ms_estimation_files(options_.ms.output_file_tag);
 else
+    if exist(['init_' options_.ms.file_tag '.dat'],'file') ~= 2 || ...
+            exist(['matlab_' options_.ms.file_tag '.prn'],'file') ~= 2 || ...
+            exist([options_.ms.file_tag '_markov_file.dat'],'file') ~= 2
+        error(['You must run ms_estimation without no_create_init as '...
+            'you are missing an initialization file it needs.']);
+    end
     if ~strcmp(options_.ms.file_tag, options_.ms.output_file_tag)
         clean_ms_estimation_files(options_.ms.output_file_tag);
     end

preprocessor/DynareBison.yy

@@ -2518,7 +2518,7 @@ o_cova_compute : COVA_COMPUTE EQUAL INT_NUMBER
                ;
 o_output_file_tag : OUTPUT_FILE_TAG EQUAL filename {driver.option_str("ms.output_file_tag", $3); };
 o_file_tag : FILE_TAG EQUAL filename { driver.option_str("ms.file_tag", $3); };
-o_no_create_init : NO_CREATE_INIT { driver.option_str("ms.create_init", "0"); };
+o_no_create_init : NO_CREATE_INIT { driver.option_num("ms.create_init", "0"); };
 o_simulation_file_tag : SIMULATION_FILE_TAG EQUAL filename { driver.option_str("ms.simulation_file_tag", $3); };
 o_coefficients_prior_hyperparameters : COEFFICIENTS_PRIOR_HYPERPARAMETERS EQUAL vec_value
                                        { driver.option_num("ms.coefficients_prior_hyperparameters",$3); };