If one calls `fundrawtransaction`, the change address will be retrieved from the keypool, though, this key/address will always be returned to the pool, leading to the problem that the next `getnewaddress()` call will restult in the same key/address.

Either we remove the auto-change-address (users would need to call `getrawchangeaddress` first [current best practice anyway]) or we add a call to keep/mark a specific key/address as change (after one have sent the funded raw transaction).

Reported by @NicolasDorier on IRC.
return  ValueFromAmount(pwalletMain->GetBalance());
    int nMinDepth = 1;
    if (request.params.size() > 1)
        nMinDepth = request.params[1].get_int();
    isminefilter filter = ISMINE_SPENDABLE;
    if(request.params.size() > 2)
        if(request.params[2].get_bool())
            filter = filter | ISMINE_WATCH_ONLY;
    if (request.params[0].get_str() == "*") {
        
        
        
        CAmount nBalance = 0;
        for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin(); it != pwalletMain->mapWallet.end(); ++it)
        {
            const CWalletTx& wtx = (*it).second;
            if (!CheckFinalTx(wtx) || wtx.GetBlocksToMaturity() > 0 || wtx.GetDepthInMainChain() < 0)
                continue;
            CAmount allFee;
            string strSentAccount;
            list<COutputEntry> listReceived;
            list<COutputEntry> listSent;
            wtx.GetAmounts(listReceived, listSent, allFee, strSentAccount, filter);
            if (wtx.GetDepthInMainChain() >= nMinDepth)
            {
                BOOST_FOREACH(const COutputEntry& r, listReceived)
                    nBalance += r.amount;
            }
            BOOST_FOREACH(const COutputEntry& s, listSent)
                nBalance -= s.amount;