[las-arith.h]: 2 bug corrections in the non x86-64 code.
[las-arith.h]: 2 bug corrections in the non x86-64 code.

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