Remove invalid check of 'pos'.
Remove invalid check of 'pos'.

This check causes the new (hixie-76) WebSockets protocol check to
hang.

hehuabing/web-socket-js,nitzo/web-socket-js,hehuabing/web-socket-js,hehuabing/web-socket-js,gimite/web-socket-js,keiosweb/web-socket-js,nitzo/web-socket-js,keiosweb/web-socket-js,gimite/web-socket-js,hanicker/web-socket-js,zhangxingits/web-socket-js,zhangxingits/web-socket-js,hanicker/web-socket-js,nitzo/web-socket-js,zhangxingits/web-socket-js,keiosweb/web-socket-js,gimite/web-socket-js,hanicker/web-socket-js