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.
{
        CMutableTransaction tx1 = *this->tx;
        CMutableTransaction tx2 = *_tx.tx;
        for (auto& txin : tx1.vin) txin.scriptSig = CScript();
        for (auto& txin : tx2.vin) txin.scriptSig = CScript();
        return CTransaction(tx1) == CTransaction(tx2);
}
std::vector<uint256> CWallet::ResendWalletTransactionsBefore(int64_t nTime, CConnman* connman)
{
    std::vector<uint256> result;
    LOCK(cs_wallet);
    
    std::multimap<unsigned int, CWalletTx*> mapSorted;
    for (std::pair<const uint256, CWalletTx>& item : mapWallet)
    {
        CWalletTx& wtx = item.second;
        
        if (wtx.nTimeReceived > nTime)
            continue;
        mapSorted.insert(std::make_pair(wtx.nTimeReceived, &wtx));
    }
    for (std::pair<const unsigned int, CWalletTx*>& item : mapSorted)
    {
        CWalletTx& wtx = *item.second;
        if (wtx.RelayWalletTransaction(connman))
            result.push_back(wtx.GetHash());
    }
    return result;
}
void CWallet::ResendWalletTransactions(int64_t nBestBlockTime, CConnman* connman)