Fix build for boost 1.58.0
Fix build for boost 1.58.0

boost::get (used in listunspent) is not properly inialized
updated to match current bitcoin implementation

https://github.com/bitcoin/bitcoin/blob/master/src/wallet/rpcwallet.cpp#L2333

NeosStore/litedoge,NeosStore/litedoge,NeosStore/litedoge,NeosStore/litedoge,NeosStore/litedoge