fix draw_pixl without any options passed.

js/pixl/public/index.html

		pixl.draw_pixl = function(pos, color, options) {
			var color = color || pixl.color;
			pixl.ctx.fillStyle = color;
			var options = options || {};
			var pos = options.rawValue ? pos : {x: Math.round(pos.x), y: Math.round(pos.y)};
			var screen_pos = pixl.to_screen(pos);
			pixl.ctx.fillRect(screen_pos.x, screen_pos.y, pixl.size, pixl.size);
			pixl.world[pos.x + "," + pos.y] = {color: color};
			var options = options || {send: true};
			if (pixl.online && options.send) {
			var send = options.hasOwnProperty('send') ? options.send : true;
			if (pixl.online && send) {
				pixl.ws.send(JSON.stringify([{x: pos.x, y: pos.y, color: color}]));
			}
		}