sql/log_event.cc:
  Fix Windows compile errors.
storage/innobase/btr/btr0sea.c:
  Fix AIX compile error (declarations must come before code in traditional C).
sql/sql_class.h:
  Fix HPUX compile problem (HP compiler bug).
  Local class of member in derived class has no access to protected members,
  so make the class global and a friend.
sql/sql_insert.cc:
  Fix HPUX compile problem (HP compiler bug).
  Local class of member in derived class has no access to protected members,
  so make the class global and a friend.