sep3dc_write_status - Set write status
logic= sep3dc_write_status(char *sep3dc, int data, int headers)
structure
whether [1] or not [0] we have written out data
whether [1] or not [0] we have written out headers
Set whether the data and/or headers of this dataset have been written (necessary
to know where to write the number of traces in a dataset)
superset