More on ticket #399: a)send full offer on 200/OK response when re-INVITE does not have SDP, b) added on_create_offer() callback, c) handle some error cases

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@1379 74dad513-b988-da41-8d7b-12977e46ad98
6 files changed