RPC: Fix signrawtransaction behaviour for new transaction types
RPC: Fix signrawtransaction behaviour for new transaction types

Was crashing due to new type not being implemented

nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official