From 2f8df19cfed63777d1d8dc968cad7298ee90ff05 Mon Sep 17 00:00:00 2001
From: Girish Ramakrishnan <girish@cloudron.io>
Date: Mon, 11 Apr 2016 11:46:57 -0700
Subject: [PATCH] check for unset variable correctly

---
 start.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/start.sh b/start.sh
index 0a81680..bbb0751 100755
--- a/start.sh
+++ b/start.sh
@@ -23,7 +23,7 @@ setup_ldap_source() {
 
 # SSH_PORT can be unset to disable SSH
 disable_ssh="false"
-if [[ -z "${SSH_PORT}" ]]; then
+if [[ -z "${SSH_PORT:-}" ]]; then
     echo "SSH disabled"
     SSH_PORT=29418 # arbitrary port to keep sshd happy
     disable_ssh="false"