[Rivet] Segmentation fault in InvMassFinalState.cc on SL5

[Holger Schulz]

Hi,

I just wanted to inform you that when rivet is compiled on SL5
there is a segmentation fault if ZFinders are applied. A backtrace
with gdb points to the function "project" in InvMassFinalState.cc
Adding a cout in that function "fixed" this problem for me.
This happened twice on differently setup environments (DESY Zeuthen
and  Humboldt  University Berlin)  that both run SL5.
The compiler was in both cases gcc 4.1.2

Holger