Fixed non fatal memory leak in slave code.


mysql-test/r/func_test.result:
  Added test for DIV
mysql-test/t/func_test.test:
  Added test for DIV
mysys/my_alloc.c:
  More DBUG statements
sql/item_func.cc:
  Added support for ULONG division with DIV
sql/log_event.cc:
  Fixed memory leak (Wrong call to init_sql_alloc)
sql/slave.cc:
  Fixed memory leak (Wrong call to init_sql_alloc)
sql/sql_base.cc:
  More DBUG statements
sql/sql_class.cc:
  Added init_for_queries() to fix memory leak in slave code
sql/sql_class.h:
  Added init_for_queries() to fix memory leak in slave code
sql/sql_error.cc:
  More DBUG statements
sql/sql_parse.cc:
  Added init_for_queries() to fix memory leak in slave code
sql/unireg.h:
  Moved memory defaults to include file