message: Set sender as change address
diff: @@ -551,6 +551,7 @@ UniValue createcontract(const JSONRPCRequest& request){
  if(!coinControl.HasSelected()){
  throw JSONRPCError(RPC_TYPE_ERROR, "Sender address does not have any unspent outputs");
  }
  + coinControl.destChange=senderAddress.Get();
  }
  EnsureWalletIsUnlocked();
  @@ -760,6 +761,7 @@ UniValue sendtocontract(const JSONRPCRequest& request){
  if(!coinControl.HasSelected()){
  throw JSONRPCError(RPC_TYPE_ERROR, "Sender address does not have any unspent outputs");
  }
  + coinControl.destChange=senderAddress.Get();
  }
  EnsureWalletIsUnlocked();
  