message: [BUG][RPC] fix signature check (against old format) in mnbudgetrawvote
diff: @@ -733,7 +733,9 @@ UniValue mnbudgetrawvote(const UniValue& params, bool fHelp)
  vote.SetVchSig(vchSig);
  if (!vote.CheckSignature(true)) {
  - return "Failure to verify signature.";
  + // try old message version
  + vote.nMessVersion = MessageVersion::MESS_VER_STRMESS;
  + if (!vote.CheckSignature(true)) return "Failure to verify signature.";
  }
  std::string strError = "";
  