build detected deprecated functions usage

build detected deprecated functions usage

[ 92%] Building CXX object libraries/plugins/peerplays_sidechain/CMakeFiles/peerplays_sidechain.dir/sidechain_net_handler_bitcoin.cpp.o
[ 92%] Building CXX object libraries/plugins/peerplays_sidechain/CMakeFiles/peerplays_sidechain.dir/sidechain_net_handler_hive.cpp.o
/home/peerplays/src/peerplays/libraries/plugins/peerplays_sidechain/sidechain_net_handler_bitcoin.cpp: In member function 'std::vector<zmq::message_t> graphene::peerplays_sidechain::zmq_listener::receive_multipart()':
/home/peerplays/src/peerplays/libraries/plugins/peerplays_sidechain/sidechain_net_handler_bitcoin.cpp:877:26: warning: 'bool zmq::detail::socket_base::recv(zmq::message_t*, int)' is deprecated: from 4.3.1, use recv taking a reference to message_t and recv_flags [-Wdeprecated-declarations]
  877 |       socket.recv(&msg, 0);
      |                          ^
In file included from /home/peerplays/src/peerplays/libraries/plugins/peerplays_sidechain/include/graphene/peerplays_sidechain/sidechain_net_handler_bitcoin.hpp:7,
                 from /home/peerplays/src/peerplays/libraries/plugins/peerplays_sidechain/sidechain_net_handler_bitcoin.cpp:1:
/usr/include/zmq.hpp:1407:10: note: declared here
 1407 |     bool recv(message_t *msg_, int flags_ = 0)
      |          ^~~~
[ 94%] Building CXX object libraries/plugins/peerplays_sidechain/CMakeFiles/peerplays_sidechain.dir/sidechain_net_handler_peerplays.cpp.o
/home/peerplays/src/peerplays/libraries/plugins/peerplays_sidechain/sidechain_net_handler_peerplays.cpp: In constructor 'graphene::peerplays_sidechain::sidechain_net_handler_peerplays::sidechain_net_handler_peerplays(graphene::peerplays_sidechain::peerplays_sidechain_plugin&, const boost::program_options::variables_map&)':
/home/peerplays/src/peerplays/libraries/plugins/peerplays_sidechain/sidechain_net_handler_peerplays.cpp:29:15: warning: variable 'get_asset_id' set but not used [-Wunused-but-set-variable]
   29 |    const auto get_asset_id = [&assets_by_symbol](const string &symbol) {
      |               ^~~~~~~~~~~~
[ 94%] Building CXX object libraries/plugins/peerplays_sidechain/CMakeFiles/peerplays_sidechain.dir/bitcoin/bech32.cpp.o
[ 94%] Building CXX object libraries/plugins/peerplays_sidechain/CMakeFiles/peerplays_sidechain.dir/bitcoin/bitcoin_address.cpp.o