better fix for threads with no parent showing up as unseen

mod/notifications.php

@@ -229,7 +229,7 @@ function notifications_content(&$a) {
 				`item`.`author-link`, `item`.`author-avatar`, `item`.`created`, `item`.`object` as `object`, 
 				`pitem`.`author-name` as `pname`, `pitem`.`author-link` as `plink` 
 				FROM `item` INNER JOIN `item` as `pitem` ON  `pitem`.`id`=`item`.`parent`
-				WHERE `item`.`unseen` = 1 AND `item`.`visible` = 1 AND
+				WHERE `item`.`unseen` = 1 AND `item`.`visible` = 1 AND `pitem`.`parent` != 0
 				 `item`.`deleted` = 0 AND `item`.`uid` = %d AND `item`.`wall` = 0 ORDER BY `item`.`created` DESC" ,
 			intval(local_user())
 		);

mod/ping.php

@@ -64,7 +64,7 @@ function ping_init(&$a) {
 				`pitem`.`author-name` as `pname`, `pitem`.`author-link` as `plink` 
 				FROM `item` INNER JOIN `item` as `pitem` ON  `pitem`.`id`=`item`.`parent`
 				WHERE `item`.`unseen` = 1 AND `item`.`visible` = 1 AND 
-				 `item`.`deleted` = 0 AND `item`.`uid` = %d AND `item`.`parent` != 0
+				 `item`.`deleted` = 0 AND `item`.`uid` = %d AND `pitem`.`parent` != 0
 				ORDER BY `item`.`created` DESC",
 			intval(local_user())
 		);