post-review fixes


mysql-test/r/events_bugs.result:
  fix result
sql/event.cc:
  fix compilation problem on windows
sql/event_executor.cc:
  show the right host in show processlist (should be event_scheduler@localhost)
sql/event_timed.cc:
  a bit more debug infor
  fix a problem introduced with previous push :( . clean everything that's whitespace.
  found because of new test cases which were crashing.
sql/sql_show.cc:
  fix compile problem on windows