This is a regression that was introduced in https://github.com/chriso/node-validator/commit/075c3594d7e1d0a5a9500d3246c470824a55e4e7 yesterday.
I've added a comment on https://github.com/chriso/node-validator/issues/136#issuecomment-11959694 (the issue that the commit was trying to solve) and created a new ticket for it at https://github.com/chriso/node-validator/issues/139 .

That said, it might not even be necessary to use `sanitize` at all and simply do
```javascript
hash.isGlobalAdmin = (row.get('admin:global') === 'true');
hash.isTenantAdmin = (row.get('admin:tenant') === 'true');
```

What do you think ?