merchant: stats fail-closed; full PATH (cron wiped zeros)

scripts/taler-merchant/landing-stats-merchant.sh

@@ -13,6 +13,7 @@
 #   eaten as fieldsep and ON_ERROR_STOP becomes the *username*).
 set -euo pipefail
 export TZ="${TZ:-Europe/Zurich}"
+export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin${PATH:+:$PATH}"
 LANDING_DIR="${LANDING_DIR:-/var/www/merchant-landing}"
 OUT="$LANDING_DIR/stats.json"
 RUN="$LANDING_DIR/stats-run.json"