Added back missing return in mysql_delete()


mysql-test/my_manage.c:
  Cleanup: Remove some #ifdef
mysql-test/r/drop_temp_table.result:
  Delete database that may be left from other test
mysql-test/t/drop_temp_table.test:
  Delete database that may be left from other test
sql/log.cc:
  false -> FALSE
  true -> TRUE
  Wait until readers_count is 0 (not just for a signal)
  
  NOTE: it's very likely that the way to handle readers_count is wrong.
  (We are in pthread_cond_wait freeing a mutex that is not the innermost mutex,
  which can lead to deadlocks)
  
  I will talk with Guilhem about this ASAP
sql/log_event.h:
  Remove number from last even to help future merges
  (all compilers I know of can handle this properly)
sql/sql_delete.cc:
  Add back missing RETURN (was lost in a merge)
  Indentation fixes