lxc-debian: protect possibly unset variable with quotes for -z check

Signed-off-by: Michael Adam <obnox@samba.org>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>

diff --git a/templates/lxc-debian.in b/templates/lxc-debian.in
index ed7fde6e95dcf7e9aa8564f6154f3b0499ff1345..2df0136e34d8350bba9521ab27fb99530710d18d 100644 (file)
--- a/templates/lxc-debian.in
+++ b/templates/lxc-debian.in
@@ -552,7 +552,7 @@ configure_debian_systemd $path $rootfs
 
 post_process ${rootfs} ${release} ${arch} ${hostarch}
 
-if [ ! -z $clean ]; then
+if [ ! -z "$clean" ]; then
     clean || exit 1
     exit 0
 fi