PHPOffice/PHPExcel — pull request #29 by lowfill (2012-08-14 18:27:52+00:00)
Title: Ensure that range related functions had a valid range to work with

When I tried to run the tests I have this error:

Fatal error: Uncaught exception 'PHPExcel_Exception' with message 'Cell coordinate can not be zero-lenght string'

Looking throuhgt the code I discover that range related functions on Cell class didn't ensure a valid range when the argument is empty.

I fix this and all the test are working again.