and so that it works correctly on Windows.


mysql-test/r/mysqlcheck.result:
  Flush tables before monkeying around with underlying MyISAM data files
mysql-test/t/mysqlcheck.test:
  Fix the test case for bug #25347 so that it actually does test the behavior.
  Also, this makes it work on Windows by ensuring that mysqld doesn't hold the
  underlying MyISAM files open while we try to corrupt them on disk.
  
  Flush tables before monkeying around with underlying MyISAM data files;
  --use-frm, so that mysqlcheck will succeed.