fix possible syntax error in failure path

Signed-off-by: Thorsten Glaser <tg@mirbsd.org>

diff --git a/grml-live b/grml-live
index 151e464..692fffb 100755 (executable)
--- a/grml-live
+++ b/grml-live
@@ -1093,7 +1093,7 @@ else
            sed -n '/^.*\[ *\([0-9]*\)[] ].*  ISOLINUX.BIN;1 *$/s//\1/p')
          if ! [ -r boot/grub/core.img ] ; then
            ewarn "boot/grub/core.img not found, not creating manifold boot ISO file"
            sed -n '/^.*\[ *\([0-9]*\)[] ].*  ISOLINUX.BIN;1 *$/s//\1/p')
          if ! [ -r boot/grub/core.img ] ; then
            ewarn "boot/grub/core.img not found, not creating manifold boot ISO file"

-         elif [ $bootoff -lt 1 ] ; then
+         elif [ "${bootoff:-0}" -lt 1 ] ; then

            ewarn "isolinux.bin not found on the ISO file, disabling manifold boot"
          else
            log "Creating hybrid ISO file with manifold method"
            ewarn "isolinux.bin not found on the ISO file, disabling manifold boot"
          else
            log "Creating hybrid ISO file with manifold method"