iso9660.c: off-by-one bug which was causing dates to come out

wrong. Thanks to Nicolas Boullis for finding and fixing.

iso9660_fs.c: remove bugs merging code from the last round of
changes/enhancements

check_common_fn.in: show full iso_read command when it fails.

test/check_common_fn.in

@@ -1,6 +1,6 @@
-# $Id: check_common_fn.in,v 1.11 2005/01/29 14:50:34 rocky Exp $
+# $Id: check_common_fn.in,v 1.12 2007/09/05 11:17:37 rocky Exp $
 #
-#    Copyright (C) 2003, 2004, 2005 Rocky Bernstein <rocky@panix.com>
+#    Copyright (C) 2003, 2004, 2005, 2007 Rocky Bernstein <rocky@gnu.org>
 #
 #    This program is free software; you can redistribute it and/or modify
 #    it under the terms of the GNU General Public License as published by
@@ -141,7 +141,7 @@ test_iso_read() {
       return 77
     fi
   else
-    echo "$0 failed running: ${ISO_READ} ${opts}"
+    echo "$0 failed running: ${ISO_READ} ${opts} -o ${outfile}"
     return 2
   fi