[PATCH] -z leaked sockets and memory with no unread news present

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attached fix ensures a clean exit with -z and no unread news.

@Dennis, this doesn't address the -w issue.

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=== modified file 'src/main.c'
--- src/main.c	2015-11-22 00:46:22 +0000
+++ src/main.c	2016-01-18 11:52:10 +0000
@@ -364,8 +364,8 @@
 	if (start_any_unread) {
 		batch_mode = TRUE;			/* Suppress some unwanted on-screen garbage */
 		if ((start_groupnum = check_start_save_any_news(START_ANY_NEWS, catchup)) == -1) {
-			free_all_arrays();
-			giveup();				/* No new/unread news so exit */
+			batch_mode = FALSE;
+			tin_done(EXIT_SUCCESS);
 		}
 		batch_mode = FALSE;
 	}


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