Also reset the status_code on requeueing

wpull2-requeue

@@ -37,5 +37,5 @@ elif [[ "${action}" == 'print' ]]
 then
 	sqlite3 "${filename}" "SELECT queued_urls.*, url_strings.* ${query}"
 else
-	sqlite3 "${filename}" 'UPDATE queued_urls SET status = "todo", try_count = 0 WHERE id IN (SELECT queued_urls.id '"${query}"')'
+	sqlite3 "${filename}" 'UPDATE queued_urls SET status = "todo", try_count = 0, status_code = NULL WHERE id IN (SELECT queued_urls.id '"${query}"')'
 fi