Fix Modem OOK BSC when having null probability by flooring the value to 1e-10 to compute the log
Fix Modem OOK BSC when having null probability by flooring the value to 1e-10 to compute the log

aff3ct/aff3ct,aff3ct/aff3ct,aff3ct/aff3ct,aff3ct/aff3ct