TT#9521 fix failed relay of 200OK without SDP.

Change-Id: Iaed4c2edc65e1d1d1c80848be1e51cd587d1c22b
(cherry picked from commit 564d4c0926)

debian/patches/series

@@ -18,3 +18,4 @@ sipwise/MT-20649-add-vsc-for-block-in-clir
 sipwise/MT-20649-change-config-validation
 sipwise/MT-20649-use-macros
 sipwise/0002-b-f-dsm-mod_conference-set-callgroup-to-conference-c.patch
+sipwise/0020-TT-9521-fix-200OK-without-SPD.patch

debian/patches/sipwise/0020-TT-9521-fix-200OK-without-SPD.patch

@@ -0,0 +1,14 @@
+Index: sems/core/AmOfferAnswer.cpp
+===================================================================
+--- sems.orig/core/AmOfferAnswer.cpp
++++ sems/core/AmOfferAnswer.cpp
+@@ -392,6 +392,9 @@ int AmOfferAnswer::onReplyOut(AmSipReply
+       if (reply.code == 183 && reply.cseq_method == SIP_METH_INVITE) {
+         // just ignore if no SDP is generated (required for B2B)
+       }
++      else if (reply.code == 200 && reply.cseq_method == SIP_METH_INVITE && state == OA_Completed) {
++        // just ignore if no SDP is generated (required for B2B)
++      }
+       else return -1;
+     }
+     else {