sipcall: reset sdp when removing call

Change-Id: If0fa3dd862404b19d024c08814292b5bba846569
GitLab: #355

src/sip/sdp.cpp

@@ -142,11 +142,6 @@ Sdp::setActiveLocalSdpSession(const pjmedia_sdp_session* sdp)
 void
 Sdp::setActiveRemoteSdpSession(const pjmedia_sdp_session* sdp)
 {
-    if (!sdp) {
-        JAMI_ERR("Remote sdp is NULL");
-        return;
-    }
-
     activeRemoteSession_ = sdp;
 }
 

src/sip/sipcall.cpp

@@ -913,6 +913,10 @@ SIPCall::removeCall()
 {
     std::lock_guard<std::recursive_mutex> lk {callMutex_};
     JAMI_WARN("[call:%s] removeCall()", getCallId().c_str());
+    if (sdp_) {
+        sdp_->setActiveLocalSdpSession(nullptr);
+        sdp_->setActiveRemoteSdpSession(nullptr);
+    }
     Call::removeCall();
     mediaTransport_.reset();
     tmpMediaTransport_.reset();