[ticket/15512] Avoid reparsing non-existent polls

PHPBB3-15512

phpBB/phpbb/textreparser/plugins/poll_title.php

@@ -34,7 +34,7 @@ class poll_title extends \phpbb\textreparser\row_based_plugin
 		$sql = 'SELECT t.topic_id AS id, t.poll_title AS text, p.enable_bbcode, p.enable_smilies, p.enable_magic_url, p.bbcode_uid
 			FROM ' . TOPICS_TABLE . ' t, ' . POSTS_TABLE . ' p
 			WHERE t.topic_id BETWEEN ' . $min_id . ' AND ' . $max_id .'
-				AND t.poll_max_options > 0
+				AND t.poll_start > 0
 				AND p.post_id = t.topic_first_post_id';
 
 		return $sql;