Problems with the varlena patch in my module

Hi,
I am having trouble with fixing my code for this recent varlena patch:

http://archives.postgresql.org/pgsql-committers/2007-04/msg00081.php

My module is fulldisjunctions.
I have several problems but first i wish to address the following.
This is an excerpt from my code:
newtset->tids = (bytea *) fastgetattr(tupleTSet, LABELS_ALIGNED,
fctx->tupleSetDesc, &isnull);

It seems that for an empty bytea (only the size of the header), i get that
VARSIZE(newtset->tids)==534765440
instead of VARHDRSZ.

What can i do?
10x.

--
Regards,
        Tzahi.
--
Tzahi Fadida
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