[reSIProcate] Rejecting media negotiation in case of SDP-less reInvite

[Robert Szokovacs]

Hi,

Consider this scenario:
1, A sends an INVITE w/o SDP
2, B replies with OK w/ SDP
3, A doesn't like it, so it sends an ACK w/o SDP.

if resiprocate is on the B side, then in step 3 it will end up in 
InviteSession.cxx:1752, calling onOfferRejected().

My question is, how to handle the situation if resiprocate is on the A side?
Calling InviteSession::reject() will result in assert, because the leg's state 
is SentReinviteAnswered.

Any help is appreciated!

TIA

br

Szo