avoid NANs in histogram of Results.zip
Event generation for the following setup fails:
I calculate pp>WWjj and require two b-jets. This implies most of the partonic subprocess to be triggerd away. However in the directory WD_2_4__j__j__W+__W-__j__j
in Results.zip there are histograms stored for those subprocesses which contain NANs. I guess that is so since @shoeche's commit 7eb43254 changing !(av>0.)
to IsBad(av)
in PHASIC++/Main/Process_Integrator.C