fix unbound variable (tmp)

scripts/raspberry-pi/install.sh

@@ -28,7 +28,7 @@ set -euo pipefail
 # - Safe to re-run; it will update binary/config/unit and restart the service.
 # ==============================================================================
 
-VERSION="${1:-${VERSION:-v0.18.1}}"
+VERSION="${1:-${VERSION:-v0.24.0}}"
 # Normalize version prefix
 if [[ ! "$VERSION" =~ ^v ]]; then
   VERSION="v${VERSION}"
@@ -141,7 +141,7 @@ ensure_dirs() {
 }
 
 download_binary() {
-  local asset url tmp
+  local asset url tmp=""
   asset="${ARCH_ASSET:-$(detect_arch_asset)}"
   url="$(download_url_for "$asset")"