p42svn dilemma

I've been modifying p42svn:

        <http://users.ox.ac.uk/~raym/software/misc/p42svn.html>

to facilitate converting the Perl Perforce repository into a Subversion mirror
and I've come up against an inconvenience. In Perforce, it is permissible to
delete a change completely from the metadata (evil I know, but we have to cope).
  I really want to make sure that the rev number in Subversion is the same as
the change number from Perforce (since there is a history, on the dev list at
least, of referring to the change numbers and I don't want to make the list
archive unusable).

So, I need to have a way to fill in these missing changes (I've alread modified
the code to create a 1-to-1 relationship between changes and revs). What is the
smallest change I can make to the dumpfile to facilitate this? I need an
effectively empty rev (I don't want to pollute the repository with phantom
changes). Is there a way I can create a dumpfile entry that consists only of a
log message and no file changes?

TIA

John

-- 
John Peacock
Director of Information Research and Technology
Rowman & Littlefield Publishing Group
4720 Boston Way
Lanham, MD 20706
301-459-3366 x.5010
fax 301-429-5747
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