fix(query) next on empty iterator to check if the iterator has a value before calling next

[amolnayak311]

Pull Request checklist

• [x] The commit(s) message(s) follows the contribution guidelines ?
• [ ] Tests for the changes have been added (for bug fixes / features) ?
• [ ] Docs have been added / updated (for bug fixes / features) ?

Current behavior :

hasNext check is not called before next is called

New behavior :

Check added.