There is an assert in `CWalletTx::RelayWalletTransaction` that gets hit.  All other code paths check `fBroadcastTransactions` before getting to `CWallet::ResendWalletTransactionsBefore` except the rpc call `resendwalletransactions`.

It's an easy fix, but we just need to decide whether to throw an error or return an empty array of rebroadcasted transaction ids.

Should be fixed for 0.15.
CReserveKey reservekey(this);
    CWalletTx wtx;
    if (!CreateTransaction(vecSend, wtx, reservekey, nFeeRet, nChangePosInOut, strFailReason, coinControl, false)) {
        return false;
    }
    if (nChangePosInOut != -1) {
        tx.vout.insert(tx.vout.begin() + nChangePosInOut, wtx.tx->vout[nChangePosInOut]);
        
        
        reservekey.KeepKey();
    }
    
    for (unsigned int idx = 0; idx < tx.vout.size(); idx++)
        tx.vout[idx].nValue = wtx.tx->vout[idx].nValue;
    
    for (const CTxIn& txin : wtx.tx->vin)
    {
        if (!coinControl.IsSelected(txin.prevout))
        {
            tx.vin.push_back(txin);
            if (lockUnspents)
            {
              LOCK2(cs_main, cs_wallet);
              LockCoin(txin.prevout);
            }
        }
    }
    return true;
}
static CFeeRate GetDiscardRate(const CBlockPolicyEstimator& estimator)