Re-add accidentally removed constant in RecordBatch

[gavin-norman-sociomantic]

Fixes a bug in unrelease code in v5.x.x.

[nemanja-boric-sociomantic]

Actually, this needs to be applied to the v4.6.x since the existing code is broken: https://github.com/sociomantic-tsunami/swarm/blob/f337984496e0f08d08f4be5997b4272d9c0e0dab/src/swarm/util/RecordBatcher.d#L446

This is the commit that broke it: https://github.com/sociomantic-tsunami/swarm/commit/4a3b231848cc09957e32276c060196cdf4e8da50#diff-2e8543d3803639dbe31ba37f78932691

[gavin-norman-sociomantic]

Mm, my reading of the branch history doesn't agree. It does look like this needs to be applied to v4.x.x, though (not v5.x.x).

[gavin-norman-sociomantic]

Yeah, at v4.6.2 (b632c1a16fa4a3763f3e5354c7fb60186777ff7a), RecordBatchBase still exists: https://github.com/sociomantic-tsunami/swarm/blob/b632c1a16fa4a3763f3e5354c7fb60186777ff7a/src/swarm/util/RecordBatcher.d#L36

[nemanja-boric-sociomantic]

Yes, sorry, it's the v4.x.x (this is where I found the error.)

[gavin-norman-sociomantic]

Rebased on v4.x.x.

[nemanja-boric-sociomantic]

Very interesting D2 failure that I can't explain for this diff?

[gavin-norman-sociomantic]

Weird. Seemingly unrelated visibility issues.

[nemanja-boric-sociomantic]

Yeah, it's travis targeting the v5.x.x branch.

[gavin-norman-sociomantic]

test this please travis