From 468208262add5f32d78bd29ebcf3ce7acb1b9d91 Mon Sep 17 00:00:00 2001
From: Phil Jay <phil@jay.id.au>
Date: Mon, 18 Sep 2023 08:55:00 +1000
Subject: [PATCH] Default variable to blank string

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

diff --git a/version-increment.sh b/version-increment.sh
index b128562..db956e6 100755
--- a/version-increment.sh
+++ b/version-increment.sh
@@ -33,7 +33,7 @@ if [[ -z "${BATS_VERSION:-}" ]] ; then
     default_branch="$(git remote show origin | ${grep} 'HEAD branch' | cut -d ' ' -f 5)"
 fi
 # use release_branch if not empty
-if [[ -n "${release_branch}" ]] ; then
+if [[ -n "${release_branch:-}" ]] ; then
     default_branch="${release_branch}" 
 fi