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.
{
    std::vector<COutput> vCoins(vAvailableCoins);
    
    if (coinControl && coinControl->HasSelected() && !coinControl->fAllowOtherInputs)
    {
        for (const COutput& out : vCoins)
        {
            if (!out.fSpendable)
                 continue;
            nValueRet += out.tx->tx->vout[out.i].nValue;
            setCoinsRet.insert(CInputCoin(out.tx, out.i));
        }
        return (nValueRet >= nTargetValue);
    }
    
    std::set<CInputCoin> setPresetCoins;
    CAmount nValueFromPresetInputs = 0;
    std::vector<COutPoint> vPresetInputs;
    if (coinControl)
        coinControl->ListSelected(vPresetInputs);
    for (const COutPoint& outpoint : vPresetInputs)
    {
        std::map<uint256, CWalletTx>::const_iterator it = mapWallet.find(outpoint.hash);
        if (it != mapWallet.end())
        {
            const CWalletTx* pcoin = &it->second;
            
            if (pcoin->tx->vout.size() <= outpoint.n)
                return false;