Merge pull request #691 from paullouisageneau/fix-pc-reset-callbacks

Fix missing reset for signaling state and track callbacks

src/impl/peerconnection.cpp

@@ -1193,6 +1193,8 @@ void PeerConnection::resetCallbacks() {
 	localCandidateCallback = nullptr;
 	stateChangeCallback = nullptr;
 	gatheringStateChangeCallback = nullptr;
+	signalingStateChangeCallback = nullptr;
+	trackCallback = nullptr;
 }
 
 } // namespace rtc::impl