From: markus schnalke <meillo@marmaro.de>
Date: Fri, 3 Feb 2012 09:42:49 +0000 (+0100)
Subject: Fixed abort of e.g. comp when draft folder is empty.
X-Git-Tag: mmh-thesis-end~380
X-Git-Url: http://git.marmaro.de/?a=commitdiff_plain;h=0b81a300d9e7cf78b6bc11d8c870f57fa81fcdc4;p=mmh

Fixed abort of e.g. comp when draft folder is empty.
In this case mp->lowoff is 1 but mp->lowmsg equal mp->hghmsg equal 0.
Hence we have an access at mp->msgstats[-1], which corrupted our mem.
Gdb hadn't helped me for this, but valgrind showed me the problem.
---

diff --git a/sbr/seq_add.c b/sbr/seq_add.c
index 5d0987c..6c99b5d 100644
--- a/sbr/seq_add.c
+++ b/sbr/seq_add.c
@@ -156,7 +156,7 @@ seq_addmsg(struct msgs *mp, char *cp, int msgnum, int public, int zero)
 	** If sequence is new, or zero flag is set, then first
 	** clear the bit for this sequence from all messages.
 	*/
-	if (new_seq || zero) {
+	if (mp->nummsg>0 && (new_seq || zero)) {
 		for (j = mp->lowmsg; j <= mp->hghmsg; j++)
 			clear_sequence(mp, i, j);
 	}