Fix bug in fq_zech_bit_pack
Fix bug in fq_zech_bit_pack

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