Entry->update when nothing has changed

[Jurgen B. <ju...@bo...>]

Calling Entry->update when nothing has changed dies with:

   Can't call method "modify" on an undefined value at
   /usr/lib/perl5/site_perl/5.005/Net/LDAP/Entry.pm line 204.
        Net::LDAP::Entry::update('Net::LDAP::Entry=HASH(0x85bea8c)')
        called at ...

This should probably either silently do nothing or return some
appropriate result code.

- Jurgen