Switched to using MPN_NORM in nmod_poly_gcd_euclidean.
Switched to using MPN_NORM in nmod_poly_gcd_euclidean.

jpflori/flint2,dsroche/flint2,jpflori/flint2,dsroche/flint2,jpflori/flint2,wbhart/flint2,dsroche/flint2,fredrik-johansson/flint2,wbhart/flint2,jpflori/flint2,wbhart/flint2,fredrik-johansson/flint2,fredrik-johansson/flint2,dsroche/flint2