Merge branch 'rs/tag-null-pointer-arith-fix' into maint

Code clean-up. * rs/tag-null-pointer-arith-fix: tag: avoid NULL pointer arithmetic

Junio C Hamano committed Oct 18, 2017 at 14:19 UTC 073a1fd9e4005091a6f37e2a57221218a115fabd

No changes.