Adding objects or arrays with blank value

[patrickp]

When the feature to be able to add a actual json object/array when doing a set.object or set.array was added the old behavior broke.

CALL WOBJ(OBJ,"SET.OBJECT","newobject","","",RERR) ; * This used to add a blank object, it now errors.
CALL WOBJ(OBJ,"SET.OBJECT","newobject","{}","",RERR); * this is what is needed now.

same with set.array
CALL WOBJ(OBJ,"SET.ARRAY","Array","","",RERR); * while this looks to work you cannot add a object to it
CALL WOBJ(OBJ,"SET.ARRAY,"Array","[]","",RERR); * this seems to work.

Propose that for either function if no value is sent to default to {} for object and [] for aray.