From 7f4cfe2c574ed1d22f4910dfdb3a03f7b9a26de0 Mon Sep 17 00:00:00 2001
From: Michael Rodler <michael@michaelrodler.at>
Date: Thu, 2 Jun 2016 16:30:28 +0200
Subject: [PATCH] fix unbound variable error

---
 bin/manage-tools | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bin/manage-tools b/bin/manage-tools
index 3543902..e88043a 100755
--- a/bin/manage-tools
+++ b/bin/manage-tools
@@ -159,7 +159,7 @@ do
 	shift
 done
 
-[ -z "$ALLOW_SUDO" ] && export ALLOW_SUDO=0
+[[ -z ${ALLOW_SUDO+x} ]] && export ALLOW_SUDO=0
 
 if [[ $# -ge 1 ]]; then
 	ACTION="$1"