Change variable check to match existing style

Signed-off-by: Tai Kedzierski <dch.tai@gmail.com>

diff --git a/templates/lxc-download.in b/templates/lxc-download.in
index 5c17785cb0382cb19d75f0f48f80d5c7d3a8bfa7..029830017bcb6a6d91d93247cda6fb5833f7786c 100644 (file)
--- a/templates/lxc-download.in
+++ b/templates/lxc-download.in
@@ -53,7 +53,7 @@ LXC_NAME=
 LXC_PATH=
 LXC_ROOTFS=
 
-if [ -z "${DOWNLOAD_KEYSERVER+x}" ]; then
+if [ -z "${DOWNLOAD_KEYSERVER:-}" ]; then
        DOWNLOAD_KEYSERVER="hkp://pool.sks-keyservers.net"
 
        # Deal with GPG over http proxy