properly select categories which have the same numeric ID as existing feeds

feedlist.js

@@ -214,7 +214,10 @@ function viewfeed(feed, subop, is_cat, subop_param, skip_history, offset) {
 				queue: { position:'end', scope: 'FEEDL-' + feed, limit: 1 } } );
 		} */
 
-		var unread_ctr = get_feed_unread(feed);
+		var unread_ctr = -1;
+		
+		if (!is_cat) unread_ctr = get_feed_unread(feed);
+
 		var cache_check = false;
 
 		if (unread_ctr != -1 && !page_offset && !force_nocache && !subop) {