fix error

dnsapi/dns_namesilo.sh

@@ -60,8 +60,8 @@ dns_namesilo_rm() {
     retcode=$(printf "%s\n" "$response" | _egrep_o "<code>300")
     if [ "$retcode" ]; then
       _record_id=$(echo "$response" | _egrep_o "<record_id>([^<]*)</record_id><type>TXT</type><host>$fulldomain</host>" | _egrep_o "<record_id>([^<]*)</record_id>" | sed -r "s/<record_id>([^<]*)<\/record_id>/\1/" | tail -n 1)
-      _debug record_id "$_record_id"
-      if [ "$record_id" ]; then
+      _debug _record_id "$_record_id"
+      if [ "$_record_id" ]; then
         _info "Successfully retrieved the record id for ACME challenge."
       else
         _info "Empty record id, it seems no such record."