fix uninitialised variable in test for mpq_init_set_readonly
fix uninitialised variable in test for mpq_init_set_readonly

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