player: initialise screen with 0 size

since resize and bounds checks work (for a whole while) now
it is not necessary anymore to assume an arbitrary default size

player.go

@@ -85,7 +85,7 @@ func NewPlayer(conn net.Conn) (p *Player) {
 		p.windowSizeLoopKill = make(chan struct{})
 		// TODO new players need to be sent to the meta lobby context
 		p.context = glgl
-		p.scr = tg.NewScreen(conn, 80, 24, tg.ColorDefault, tg.ColorDefault)
+		p.scr = tg.NewScreenEmpty(conn, tg.ColorDefault, tg.ColorDefault)
 		go p.windowSizeLoop()
 		gs.players[p.name] = p
 	}