fix error feed (i.e. when requested feed no longer exists) not display properly

classes/feeds.php

@@ -991,7 +991,7 @@ class Feeds extends Handler_Protected {
 	private function generate_error_feed($error) {
 		$reply = array();
 
-		$reply['headlines']['id'] = -6;
+		$reply['headlines']['id'] = -7;
 		$reply['headlines']['is_cat'] = false;
 
 		$reply['headlines']['toolbar'] = '';

js/viewfeed.js

@@ -46,7 +46,7 @@ function headlines_callback2(transport, offset, background, infscroll_req) {
 				return;
 			}
 
-			if (feed_id != getActiveFeedId() || is_cat != activeFeedIsCat())
+			if (feed_id != -7 && (feed_id != getActiveFeedId() || is_cat != activeFeedIsCat()))
 				return;
 
 			/* dijit.getEnclosingWidget(