Removing the player id from forwarded messages when they're sent to t…

…he player. Some pixel streaming functionality was basing conditions off whether the player id field was existing or not (#91)

SignallingWebServer/cirrus.js

@@ -440,6 +440,7 @@ function forwardStreamerMessageToPlayer(streamer, msg) {
 	const player = players.get(playerId);
 	if (player) {
 		logForward(streamer.id, playerId, msg);
+		delete msg.playerId;
 		player.sendTo(msg);
 	}
 }