sequelize/sequelize — pull request #1849 by hycheung0509 (2014-06-03 04:14:03+00:00)
Title: [Ref #1824] Fix TypeError if got empty rows from findAndCountAll() with group

This error does not exist in version 2.0.0-dev11, so that I have not find out the origin of the bug, and make this fix for version 1.7.x.