rpc: fixed getUncleBy*
rpc: fixed getUncleBy*

RomanZacharia/pyethapp,d-das/pyethapp,changwu-tw/pyethapp,changwu-tw/pyethapp,gsalgado/pyethapp,RomanZacharia/pyethapp,ethereum/pyethapp,ethereum/pyethapp,vaporry/pyethapp,gsalgado/pyethapp,kustomzone/pyethapp,heikoheiko/pyethapp