From 7ac02f0555ec1f6cf59c9bdc5fab42e90250e1b7 Mon Sep 17 00:00:00 2001
From: piaip <piaip@63ad8ddf-47c3-0310-b6dd-a9e9d9715204>
Date: Fri, 6 Apr 2012 01:44:37 +0000
Subject: Fix segv: #1FVS--wT (PttBug) [ptt2.cc]

git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5598 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
---
 pttbbs/mbbsd/friend.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pttbbs/mbbsd/friend.c b/pttbbs/mbbsd/friend.c
index 5b7992b2..8cf2eca2 100644
--- a/pttbbs/mbbsd/friend.c
+++ b/pttbbs/mbbsd/friend.c
@@ -139,6 +139,8 @@ friend_append(int type, int count)
 	move(2, 0);
 	clrtobot();
 	outs("要引入哪一個名單?\n");
+
+        // TODO make the selection algorithm better here.
 	for (j = i = 0; i < 4; i++)
 	    if (i != type) {
 		++j;
@@ -178,6 +180,8 @@ friend_append(int type, int count)
     if (j == FRIEND_SPECIAL)
 	friend_special();
 
+    if (!friend_file[j])
+        return;
     setfriendfile(sfile, j);
 
     if ((fp = fopen(sfile, "r")) != NULL) {
-- 
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