[Rivet] FinalState segfaulting

[Holger Schulz]

Hi all,

while playing with some SUSY models, I realised that the FinalState 
projection
segfaults when asking for .particles().

As a quickfix, I removed the FinalState Projection form the code for the 
moment.
This however seems to be responsible for the trunk failing to compile.

Should I look deeper into this?

Best,
Holger