bundles/backup-client: fix detection of rsync errors

bundles/backup-client/files/generate-backup

@@ -17,15 +17,15 @@ rsync -zaAP --numeric-ids --delete --relative \
     "${path}" "$ssh_login":backups/
 
 exitcode=$?
-if (( exitcode != 0 )) && (( exitcode != 24 ))
+if [[ $exitcode != 0 ]] && [[ $exitcode != 24 ]]
 then
-    rsync_errors+=" $ret"
+    rsync_errors+=" $exitcode"
 fi
 % endfor
 
 if [[ -n "$rsync_errors" ]]
 then
     echo "rsync_error$rsync_errors" > "$statusfile"
-fi
-
+else
     echo "ok" > "$statusfile"
+fi