Patrick Hiesel fd367f661d Test for null values in DefaultRefFilter
If JGit can't find the ref, it will return null. There is no guarantee
that we have a change meta ref for each change so we want to log these
instances instead of failing the entire operation.

Change-Id: I2e33d05e77bb80c2e1db6b5ee0067dfefa25cce2
2019-01-14 15:30:14 +01:00
..
2018-12-21 13:54:37 -08:00
2018-11-13 15:06:26 -08:00
2018-08-14 08:07:59 +02:00