From 89f4374a9110920d3d54b27f0dd8b87b9b5a3001 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89ric=20Gaspar?=
 <46165813+ericgaspar@users.noreply.github.com>
Date: Sat, 18 Feb 2023 18:11:10 +0100
Subject: [PATCH] Update upgrade

---
 scripts/upgrade | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/scripts/upgrade b/scripts/upgrade
index 86670d6..f10fe6f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -21,19 +21,19 @@ upgrade_type=$(ynh_check_app_version_changed)
 ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
 
 # If fpm_footprint doesn't exist, create it
-if [ -z "$fpm_footprint" ]; then
+if [ -z "${fpm_footprint:-}" ]; then
     fpm_footprint=low
     ynh_app_setting_set --app=$app --key=fpm_footprint --value=$fpm_footprint
 fi
 
 # If fpm_free_footprint doesn't exist, create it
-if [ -z "$fpm_free_footprint" ]; then
+if [ -z "${fpm_free_footprint:-}" ]; then
     fpm_free_footprint=0
     ynh_app_setting_set --app=$app --key=fpm_free_footprint --value=$fpm_free_footprint
 fi
 
 # If fpm_usage doesn't exist, create it
-if [ -z "$fpm_usage" ]; then
+if [ -z "${fpm_usage:-}" ]; then
     fpm_usage=low
     ynh_app_setting_set --app=$app --key=fpm_usage --value=$fpm_usage
 fi