Fix test after fix for bug #63943 (Bad warning text from strpos() on empty needle)
See commit c05ee74e7ff28b49018bf3e8f452bfd5386d1b68
Merge branch 'PHP-5.3' into PHP-5.4

* PHP-5.3:
  Fix test after fix for bug #63943 (Bad warning text from strpos() on empty needle) See commit c05ee74e7ff28b49018bf3e8f452bfd5386d1b68