[AGENT++] Improvements in Pdu::operator+=(const Vb&)

[Jochen Katz]

Hi,

for the next release _all_ Pdu functions will check validity of Vb objects.

Regards,
   Jochen


> Pdu& Pdu::operator+=(const Vb &vb)

> First, the comment about appending a string is is a bit odd
> (copy&paste issue?). Second, I believe that the function should
> refuse to add an invalid Vb. Finally, it should check if the copy is
> valid.