Fixed chat stream bugs when accepting proposal in Session

darcs-hash:20090330145410-58103-60a9cce0c7c56c27638449b14d7c295b2d478a9c
sip_session: print SCSessionRejectStreamProposal notifications

darcs-hash:20090330145549-b2873-44dcdcf2f8b2a7ba73f0cb545614cb78c169fe4f