* mmelmo-2.el (initialize-instance): Use `mime-buffer-entity-buffer-internal'

* mmelmo-2.el (initialize-instance): Use `mime-buffer-entity-buffer-internal'
instead of `mime-entity-buffer'.

* mmelmo-imap4-2.el (mmelmo-imap4-mime-entity-buffer): New function.
(mime-entity-body): Implemented.
(mime-goto-header-start-point): Deleted.
(mime-goto-body-end-point): Ditto.
(mime-entity-point-min): Ditto.
(mime-entity-point-max): Ditto.
(mime-entity-children): Ditto.
(mime-insert-header): Use `mime-buffer-entity-buffer-internal'
instead of `mime-entity-buffer'.
(mime-entity-header-buffer): Ditto.
(mime-entity-body-buffer): Ditto.
(mime-write-entity-content): Ditto.

* pldap.el (ldap-static-if): New macro.
(toplevel): Use it instead of `static-if'.