Removing duplicate code from mysql-test-run.pl

    mtr_add_arg($args, "%s--user=root");

  }

  # When mysqld is run by a root user(euid is 0), it will fail

  # to start unless we specify what user to run as, see BUG#30630

  my $euid= $>;

  if (!$glob_win32 and $euid == 0 and

      (grep(/^--user/, @$extra_opt, @opt_extra_mysqld_opt)) == 0) {

    mtr_add_arg($args, "%s--user=root", $prefix);

  }

  if ( $opt_valgrind_mysqld )

  {

    mtr_add_arg($args, "%s--skip-safemalloc", $prefix);