helicsBrokerSendCommand has incorrect signature #101
Description
Describe the bug
helicsBrokerSendCommand has the signature helicsBrokerSendCommand(broker, target, command, err)
The err should not be there. Currently it is possible to work around just by supplying an argument (it is not used), but this needs to be resolved in the next release
the same is true for all command related operations for helicsBroker and helicsCore