MDEV-18428 Memory: If transactional=0 is specified in CREATE TABLE, it is not...

MDEV-18428 Memory: If transactional=0 is specified in CREATE TABLE, it is not possible to ALTER TABLE

fix "engine does not support TRANSACTIONAL=1" error message to
match user input

mysql-test/r/create.result

@@ -1290,7 +1290,7 @@ drop table if exists t1,t2,t3;
 # Fix modified for MariaDB: we support this syntax
 create table t1 (a int) transactional=0;
 Warnings:
-Warning	1478	Table storage engine 'MyISAM' does not support the create option 'TRANSACTIONAL=1'
+Warning	1478	Table storage engine 'MyISAM' does not support the create option 'TRANSACTIONAL=0'
 create table t2 (a int) page_checksum=1;
 create table t3 (a int) row_format=page;
 drop table t1,t2,t3;

sql/sql_table.cc

@@ -4254,7 +4254,8 @@ mysql_prepare_create_table(THD *thd, HA_CREATE_INFO *create_info,
                           ER_ILLEGAL_HA_CREATE_OPTION,
                           ER_THD(thd, ER_ILLEGAL_HA_CREATE_OPTION),
                           file->engine_name()->str,
-                          "TRANSACTIONAL=1");
+                          create_info->transactional == HA_CHOICE_YES
+                          ? "TRANSACTIONAL=1" : "TRANSACTIONAL=0");
 
   if (parse_option_list(thd, file->partition_ht(), &create_info->option_struct,
                           &create_info->option_list,