Correct a bug that was somehow both obvious and hard-to-see. :-)

An incorrectly-sized allocation was being made due to an incorrect
argument to the `sizeof' operator.  Obvious, because it violated the
`foo = malloc(sizeof(*foo))' idiom.  Hard-to-see, because it was a
missing `*' (`*p' versus `**p').

Resulting failure was
Reported by:	ache

Sponsored by:	DARPA, Network Associates Laboratories

lib/libc/include/nss_tls.h

@@ -64,7 +64,7 @@ name##_getstate(struct name##_state **p)			\
 	*p = _pthread_getspecific(name##_state_key);		\
 	if (*p != NULL)						\
 		return (0);					\
-	*p = calloc(1, sizeof(*p));				\
+	*p = calloc(1, sizeof(**p));				\
 	if (*p == NULL)						\
 		return (ENOMEM);				\
 	rv = _pthread_setspecific(name##_state_key, *p);	\