[polyselect2l.c] fixed memory leak for nq=0
[polyselect2l.c] fixed memory leak for nq=0

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