Fix "Parse message failed" error in WebRTC Signaling Demo Project (#1209)

Author: Switchbreak

networking/webrtc_signaling/server/ws_webrtc_server.gd

@@ -207,7 +207,7 @@ func _parse_msg(peer: Peer) -> bool:
 	if typeof(parsed) != TYPE_DICTIONARY or not parsed.has("type") or not parsed.has("id") or \
 		typeof(parsed.get("data")) != TYPE_STRING:
 		return false
-	if not str(parsed.type).is_valid_int() or not str(parsed.id).is_valid_int():
+	if parsed.type is not float or parsed.id is not float:
 		return false
 
 	var msg := {