ZF-12389: isLast not working as expected in Zend_Service_Amazon_SimpleDb_Page
The isLast method on Zend_Service_Amazon_SimpleDb_Page-objects checks wether the NextToken is null or not, when determining wether or not it is the last page for the query.
However, the Zend_Service_Amazon_SimpleDb sets the NextToken to an empty string, if there is no NextToken, so the isLast method doesn't work as intended.
As I see it could be fixed either in Zend_Service_Amazon_SimpleDb or Zend_Service_Amazon_SimpleDb_Page. I don't know which would be better for the framework.