[Rivet] fastjet version for rivet

[Hendrik Hoeth]

Hi Albert,

Thus spake Albert Knutsson (albert.knutsson at desy.de):

> Is there any major changes between 2.4.0 and 2.4.2 and a particular 
> reason that I can not use 2.4.0 with Rivet? If not, maybe I can just 
> hack the configure somehow and avoid this "block"?

there are bug fixes in 2.4.2 which are important for Rivet, that's why
we check for the version. Some analyses will crash Rivet if you try to
use them with 2.4.0 or 2.4.1.

Cheers,

    Hendrik

-- 
One doesn't discover new lands without consenting to lose
sight of the shore for a very long time.    -- André Gide