PROTON-2184: fix assert in pn_session_set_context
PROTON-2184: fix assert in pn_session_set_context

gemmellr/qpid-proton,astitcher/qpid-proton,ssorj/qpid-proton,apache/qpid-proton,apache/qpid-proton,astitcher/qpid-proton,ssorj/qpid-proton,ssorj/qpid-proton,apache/qpid-proton,ChugR/qpid-proton,gemmellr/qpid-proton,astitcher/qpid-proton,ChugR/qpid-proton,apache/qpid-proton,astitcher/qpid-proton,gemmellr/qpid-proton,ssorj/qpid-proton,astitcher/qpid-proton,ChugR/qpid-proton,astitcher/qpid-proton,gemmellr/qpid-proton,gemmellr/qpid-proton,ChugR/qpid-proton,ChugR/qpid-proton,ssorj/qpid-proton,ssorj/qpid-proton,gemmellr/qpid-proton,apache/qpid-proton,apache/qpid-proton,ChugR/qpid-proton