correct array bounds for the pthread_t array by adding one space

Index: nast/ncurses/n_nast.h
===================================================================
--- nast.orig/ncurses/n_nast.h	2012-06-16 13:00:31.000000000 -0700
+++ nast/ncurses/n_nast.h	2012-06-16 20:16:06.000000000 -0700
@@ -113,7 +113,7 @@
 pcap_dumper_t *dumper;
 
 /* thread for database connections */
-pthread_t thID[6];
+pthread_t thID[7];
 
 struct thread_conn
 {
