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.
{
    
    int nMinDepth = 1;
    if (params.size() > 0)
        nMinDepth = params[0].get_int();
    
    bool fIncludeEmpty = false;
    if (params.size() > 1)
        fIncludeEmpty = params[1].get_bool();
    isminefilter filter = ISMINE_SPENDABLE;
    if(params.size() > 2)
        if(params[2].get_bool())
            filter = filter | ISMINE_WATCH_ONLY;
    
    map<CBitcoinAddress, tallyitem> mapTally;
    for (map<uint256, CWalletTx>::iterator it = pwalletMain->mapWallet.begin(); it != pwalletMain->mapWallet.end(); ++it)
    {
        const CWalletTx& wtx = (*it).second;
        if (wtx.IsCoinBase() || !CheckFinalTx(*wtx.tx))
            continue;
        int nDepth = wtx.GetDepthInMainChain();
        if (nDepth < nMinDepth)
            continue;
        BOOST_FOREACH(const CTxOut& txout, wtx.tx->vout)