[t:4704] Fix type punning on main line. Refs #4704.

static int

insert(DB_ENV *env, DB *db, void *UU(extra))

{

    char val[VAL_SIZE];

    assert(VAL_SIZE%sizeof(int)==0);

    int val[VAL_SIZE/sizeof(int)];

    memset(val, 0, sizeof val);

    DB_TXN *txn;

    int r = env->txn_begin(env, 0, &txn, 0);

    CKERR(r);

    for (int i = 0; i < NUM_ROWS; ++i) {

        DBT k, v;

        *((int *) val) = i;

        val[0] = i;

        r = db->put(db, txn, dbt_init(&k, &i, sizeof i), dbt_init(&v, val, sizeof val), 0);

        CKERR(r);

    }