Add missing Gitaly branch_update nil checks

Jacob Vosmaer requested to merge gitaly-ff-branch-nil into master

What does this MR do?

Adds missing nil checks in GitalyClient. This fixes one or more regressions.

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

What are the relevant issue numbers?


Edited by Rémy Coutable

Merge request reports