snap_preseed: Handle SNAP_NO_VALIDATE_SEED being unset

Some builds run with `set -u` and were broken due to this.
5 years ago · 2d19a9446e
parent bf6d8253ea
commit 2d19a9446e
1 changed files with 1 additions and 1 deletions
--- a/live-build/functions
+++ b/live-build/functions
@ -656,7 +656,7 @@ snap_preseed() {
    # i.e. snaps with bases need to add bases first etc
    #
    # Skip validation by setting SNAP_NO_VALIDATE_SEED=1.
-    if [ -z "${SNAP_NO_VALIDATE_SEED}" ]; then
+    if [ -z "${SNAP_NO_VALIDATE_SEED:-}" ]; then
        snap_validate_seed "${CHROOT_ROOT}"
    fi
 }