[Rivet] Poll: deltaEta -- signed or unsigned?

[Hendrik Hoeth]

Thus spake Leif Lönnblad (leif.lonnblad at thep.lu.se):

> I guess I would anyway vote for the unsigned version.

Okay, unsigned it is.

-- 
The minimum number of planes one should own is one. The correct number
is n+1, where n is the number of planes currently owned. This equation
may also be re-written as s-1, where s is the number of planes owned
that would result in separation from your partner.       -- Veluminati