Actually, it seems that logs a nasty message to /var/log/lightdm/:0-greeter.log, but it isn't really a critical problem, so maybe it should just be a simple: if(session == NULL) return;
Actually, it seems that logs a nasty message to /var/log/ lightdm/ :0-greeter. log, but it isn't really a critical problem, so maybe it should just be a simple: if(session == NULL) return;