fixed the close_peerlog() bug causing ipsec pluto --help to segfault

src/pluto/log.c

@@ -95,7 +95,7 @@ void
 close_peerlog(void)
 {
     /* exit if the queue has not been initialized */
-    if (TAILQ_LAST(&perpeer_list, perpeer) == NULL)
+    if (perpeer_list.tqh_last == NULL)
       return;
 
     /* end of queue is given by pointer to "HEAD" */