[rootsieve.c] several changes, included pseudo irreducibility test
[rootsieve.c] several changes, included pseudo irreducibility test

mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs