tree 7867cbaaa4fc9302cfd0b4cb7cd7642ec3aa77f4
parent 1d1df74c480d525011f352f76010becb315eeca5
author Yolanda Robla <info@ysoft.biz> 1408960767 +0200
committer Yolanda Robla <yolanda.robla-mota@hp.com> 1409133288 +0200

Add check for ref being a string before applying regex

Incorrect filter by ref in zuul layout could end on
applying a regex to a None value, causing an error and
zuul crashing. That is not an usual thing but could happen
and zuul crashes because of that.

Add the comparison for ref not being None
before applying the regex, as it was done for comment
comparison.

Change-Id: Ie58bb288a1f7609564283a0062e08ecc45b28cd0