Possible bug in pagination.

[pkaleta]

@wyuenho it feels weird that lastPage is less than firstPage in case when page numbers are 1-based and totalRecords is 0:

https://github.com/wyuenho/backbone-pageable/blob/master/test/server-pageable.js#L142

Is it a bug?

Anyway this causes a bug in backgrid-paginator. When a collection is empty, the links to next and last page are not disabled: https://github.com/wyuenho/backgrid-paginator/blob/master/backgrid-paginator.js#L152

[wyuenho]

lastPage should probably be set back to null to indicate that value is temporarily meaningless. If you can help me with that it'll be great. Otherwise I'll deal with it sometime next week.