Merge PR mumble-voip#5893: FIX(server, rpc): Don't send useless UserS…

…tate message

As it was, the sent UserState message would have only contained the user's session ID, which in and of itself is absolutely useless. Thus, it is better to not send a UserState message in this case.

src/murmur/RPC.cpp

@@ -408,10 +408,6 @@ void Server::setListenerVolumeAdjustment(ServerUser *user, const Channel *cChann
 	MumbleProto::UserState mpus;
 	mpus.set_session(user->uiSession);
 
-	if (!broadcastListenerVolumeAdjustments) {
-		sendExcept(user, mpus);
-	}
-
 	MumbleProto::UserState::VolumeAdjustment *volume_adjustment = mpus.add_listening_volume_adjustment();
 	volume_adjustment->set_listening_channel(cChannel->iId);
 	volume_adjustment->set_volume_adjustment(volumeAdjustment.factor);