[polyselect2l.c] fixed check_parameters() routine (was buggy)
[polyselect2l.c] fixed check_parameters() routine (was buggy)

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