From d3c8a1bb2f5db3645adb11449d341251ccb2205d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Lebleu?= <jerome@maroufle.fr>
Date: Mon, 30 Nov 2015 19:02:12 +0100
Subject: [PATCH] [fix] Prevent error if unset variable is treated in utils
 helper

---
 data/apps/helpers.d/utils | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/data/apps/helpers.d/utils b/data/apps/helpers.d/utils
index 87cd47f6b..a6755e3c8 100644
--- a/data/apps/helpers.d/utils
+++ b/data/apps/helpers.d/utils
@@ -12,7 +12,7 @@ ynh_get_plain_key() {
             [[ "$line" =~ ^${prefix}[^#] ]] && return
             echo $line
         elif [[ "$line" =~ ^${prefix}${key}$ ]]; then
-            if [[ -n "$1" ]]; then
+            if [[ -n "${1:-}" ]]; then
                 prefix+="#"
                 key=$1
                 shift