dmwm/CRABClient — pull request #4084 by qunox (2014-06-01 08:59:48+00:00)
Title: update checkwrite for issue #4074

the TypeError or NameError happen when the pfn return is empty. So line 28 is added to prevent this from happening
see : https://github.com/dmwm/CRABClient/commit/31bacc3