(Repeats without changes for additional subscribers. Correctsto show Nielsen data is for broadcast TV-only) * Labor talks between NHL, players have stalled * NHL sets Sept. 15 lockout deadline; season starts Oct. 11 * NBC Sports Network ratings at risk in strike * Advertisers scrambling for alternatives Sept 5, (Reuters) - NBC executives are hoping that theNational Hockey League and its players union reach a new laboragreement and avoid a lockout that could leave the networkscrambling to find a replacement for one of its sportsprogramming mainstays. ...