[polyselect2l_str.c] use i + floor(i/2^32) as key in shash_find_collision()
[polyselect2l_str.c] use i + floor(i/2^32) as key in shash_find_collision()

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