viewfeed: update local db on catchup

feedlist.js

@@ -186,6 +186,8 @@ function viewfeed(feed, subop, is_cat, subop_param, skip_history, offset) {
 
 		if (subop == "MarkAllRead") {
 
+			catchup_local_feed(feed, is_cat);
+
 			var show_next_feed = getInitParam("on_catchup_show_next_feed") == "1";
 
 			if (show_next_feed) {

offline.js

@@ -1272,6 +1272,8 @@ function update_local_sync_data() {
 
 function catchup_local_feed(id, is_cat) {
 	try {
+		if (!db) return;
+
 		if (!is_cat) {
 			if (id >= 0) {
 				db.execute("UPDATE articles SET unread = 0 WHERE feed_id = ?", [id]);