Fix the same basic error in all our curses programs: When the

stdin-fd is dead, it takes more than "break;" to get out of a
switch-in-a-loop.

bin/varnishhist/varnishhist.c

@@ -397,6 +397,7 @@ do_curses(void *arg)
 		timeout(delay * 1000);
 		switch ((ch = getch())) {
 		case ERR:
+			quit = 1;
 			break;
 #ifdef KEY_RESIZE
 		case KEY_RESIZE:

bin/varnishstat/varnishstat_curses.c

@@ -1030,6 +1030,7 @@ do_curses(struct vsm *vsm, struct vsc *vsc, double delay)
 
 		switch (ch = wgetch(w_status)) {
 		case ERR:
+			keep_running = 0;
 			break;
 #ifdef KEY_RESIZE /* sigh, Solaris lacks this.. */
 		case KEY_RESIZE:

bin/varnishtop/varnishtop.c

@@ -271,14 +271,15 @@ do_curses(void *arg)
 	AC(intrflush(stdscr, FALSE));
 	(void)curs_set(0);
 	AC(erase());
+	timeout(1000);
 	while (!quit) {
 		AZ(pthread_mutex_lock(&mtx));
 		update(period);
 		AZ(pthread_mutex_unlock(&mtx));
 
-		timeout(1000);
 		switch (getch()) {
 		case ERR:
+			quit = 1;
 			break;
 #ifdef KEY_RESIZE
 		case KEY_RESIZE: