Bug #1392 "On Win, slave leaves one temp file after successf. replicating LOAD DATA INFILE"
Windows-specific bug (we forgot to close a file before deleting it).
Patch written by me, tested by Miguel (thanks!) and it works.


sql/log.cc:
  changed the comment to mean the truth
sql/log_event.cc:
  When you finish replicating LOAD DATA INFILE, close the SQL_LOADxxx.data file
  before deleting it, or Windows will refuse to delete.
  No need to do the same thing for the SQL_LOADxxx.data file, it's not opened
  at this moment.