Fix crash if fnext/fprev are given an empty folder list

[mmh] / uip / new.c

diff --git a/uip/new.c b/uip/new.c
index 82d6db5..254950b 100644 (file)
--- a/uip/new.c
+++ b/uip/new.c
@@ -4,8 +4,6 @@
  *       -- as fnext,  move to next folder with unseen messages
  *       -- as fprev,  move to previous folder with unseen messages
  *       -- as unseen, scan all unseen messages
- * $Id$
- *
  * This code is Copyright (c) 2008, by the authors of nmh.  See the
  * COPYRIGHT file in the root directory of the nmh distribution for
  * complete copyright information.
@@ -310,7 +308,10 @@ doit(char *cur, char *folders, char *sequences[])
                  folders, sequences);
 
     if (run_mode == FNEXT || run_mode == FPREV) {
-       if (first->n_next == NULL) {
+       if (first == NULL) {
+           /* No folders at all... */
+           return NULL;
+       } else if (first->n_next == NULL) {
            /* We have only one node; any desired messages in it? */
            if (first->n_field == NULL) {
                return NULL;