rescan() method changes field orig value if it was empty

[SYTDeath]

    var rescan = function() {
      var $form = $(this);
      var fields = $form.find(settings.fieldSelector);
      $(fields).each(function() {
        var $field = $(this);
        if (!$field.data('ays-orig')) {
          storeOrigValue($field);
          $field.bind(settings.fieldEvents, checkForm);
        }
      });
      // Check for changes while we're here
      $form.trigger('checkform.areYouSure');
    };

Above is the rescan method. On line 6, the expression returns true if

• the field's data attribute (ays-orig) is undefiend, or

• the field's value is empty

In reality, fields may be empty when page is loaded for the first time. Running this method will lose the original ays-orig values of those fields.

Is there any reason why empty fields have to update their ays-orig values?

[sb-relaxt-at]

Just found this bug too. From my point of view checking for undefined seems to work.