Bogus work-around the "mpn_modexact_1_odd" problem.
Bogus work-around the "mpn_modexact_1_odd" problem.

This is *not* a correct fix.  It merely allows the code to compile without
any problems on Sebastian's machine.

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