SONKillRange

  SONKILLRANGE attempts to discard data from a file between two times

  FLAG=SONKILLRANGE(FH, CHAN, STARTTIME, ENDTIME)
  FH is the SON file handle, CHAN  is the channel number and STARTTIME and
  ENDTIME specify the time range (in clock ticks within which to discard
  data. 

  This is only useful when data are being written to a new file. 
  See CED documentation for details

  Author:Malcolm Lidierth
  Matlab SON library:
  Copyright © The Author & King's College London 2005-2006