SONWriteEventBlock

  SONWRITEEVENTBLOCK writes data to an ADC channel

  RET=SONWRITEEVENTBLOCK(FH, CHAN, BUFFER, COUNT)
  INPUTS: FH the SON file handle
          CHAN the target channel
          BUFFER the data to be written containing int32 timestamps
          COUNT the number of data items to write from buffer

  Returns zero or a negative error code.

  For efficient use of disc space, COUNT should be  a multiple of 
  (BUFSIZE bytes - 20)/4 , where BUFSIZE is supplied in a prior call to
  SONSETEVENTCHAN (20 is the size of the block header on disc)

  see CED documentation

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