mysql-test/r/rpl_bit_npk.result:
  Updated results
mysql-test/t/disabled.def:
  rpl_bit_npk now works
sql/field.h:
  Field_bit::cmp_binary_offset wrongly used base class method that does not work for Field_bit
  This was discussed with Monty and should be pushed into 5.0 too
sql/log_event.cc:
  Added checks for null bits
  Swapped use of m_after_image (was m_search_record) and table->record[1] to use record[i] 
  in the same way as other MySQL code (i.e. use record[1] for scan data).
  Removed use of cmp_binary in record_compare (it is currently wrong to use that 
  without copying the null bits to the compare data record)
sql/log_event.h:
  Name change to indicate new semantics