Update create_lxc.sh

misc/create_lxc.sh

@@ -244,7 +244,10 @@ PCT_OPTIONS=(${PCT_OPTIONS[@]:-${DEFAULT_PCT_OPTIONS[@]}})
 
 # Secure creation of the LXC container with lock and template check
 lockfile="/tmp/template.${TEMPLATE}.lock"
-exec 9>"$lockfile"
+exec 9>"$lockfile" >/dev/null 2>&1 || {
+  msg_error "Failed to create lock file '$lockfile'."
+  exit 200
+}
 flock -w 60 9 || {
   msg_error "Timeout while waiting for template lock"
   exit 211