reproducible Debian: avoid syntax error if string is empty

Signed-off-by: Holger Levsen <holger@layer-acht.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/update_jdn.sh b/update_jdn.sh
index d2275ad0..ebf903c2 100755
--- a/update_jdn.sh
+++ b/update_jdn.sh
@@ -127,7 +127,7 @@ u_shell['jenkins-adm']='/bin/bash'
 # get the users out of the user_host_groups array's index
 users=$(for i in ${!user_host_groups[@]}; do echo ${i%,*} ; done | sort -u)
 
-( $UP2DATE && [ -z $(find authorized_keys -newer $0) ] ) || for user in ${users}; do
+( $UP2DATE && [ -z "$(find authorized_keys -newer $0)" ] ) || for user in ${users}; do
 	# -v is a bashism to check for set variables, used here to see if this user is active on this host
 	if [ ! -v user_host_groups["$user","$HOSTNAME"] ] && [ ! -v user_host_groups["$user",'*'] ] && [ ! -v user_host_groups["$user","$DPKG_ARCH"] ] ; then
 		continue