[PATCH] libanl: properly cleanup if first helper thread creation failed (bug 22927)

[Florian Weimer]

* Andreas Schwab:

> 	[BZ #22927]
> 	* resolv/gai_misc.c (__gai_enqueue_request): Don't crash if
> 	creating the first helper thread failed.

Looks okay to me.  Thanks.

Florian