libpq++ doc error?

I'm beginning to think I created my own error!  After looking over the
sources I'm thinking I did the cut-n-paste from the same source but a
different function (if that makes sense).

I just sent patches for libpq++ to return an int (I'll also submit changes
to the sgml docs) and return a -1 if PQcmdTuples() returns a NULL pointer.
I just haven't been able to convince it to return a NULL.

Vince.
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