During investigating issue #860 I found out a nasty side-effect of de…

…fining ISO_MAX_SIZE=4096 in local.conf.

The script 81_prepare_multiple_iso.sh created several empty ISO images where only 1 ISO image should have been created.
Well, got this corrected and committing it into our master repo.

Please note that this will not fix the issue described in issue #860, however, it was a nasty side-kick bug.

usr/share/rear/output/ISO/Linux-i386/81_prepare_multiple_iso.sh

@@ -27,7 +27,7 @@ local isofs_path=$(dirname $backuparchive)
 # NB_ISOS=(ls . | wc -l) [side effect is that lots of empty ISOs are made]
 [[ "$WORKFLOW" = "mkrescue" ]] && return
 
-NB_ISOS=$(ls $backuparchive.?? | wc -l)
+NB_ISOS=$(ls ${backuparchive}.?? | wc -l)
 
 Print "Preparing $NB_ISOS ISO images ..."
 echo -n "$(basename $backuparchive.00)" >> "${isofs_path}/backup.splitted"