block unsubscribe requests for virtual feeds

functions.php

@@ -1836,12 +1836,6 @@
 
 	function initialize_user($link, $uid) {
 
-/*		db_query($link, "insert into ttrss_labels (owner_uid,sql_exp,description) 
-			values ('$uid','unread = true', 'Unread articles')");
-
-		db_query($link, "insert into ttrss_labels (owner_uid,sql_exp,description) 
-			values ('$uid','last_read is null and unread = false', 'Updated articles')"); */
-
 		db_query($link, "insert into ttrss_feeds (owner_uid,title,feed_url)
 			values ('$uid', 'Tiny Tiny RSS: New Releases',
 			'http://tt-rss.org/releases.rss')");

modules/pref-feeds.php

@@ -703,8 +703,6 @@
 
 		if ($subop == "remove") {
 
-			if (!WEB_DEMO_MODE) {
-
 			$ids = split(",", db_escape_string($_GET["ids"]));
 
 			foreach ($ids as $id) {
@@ -719,13 +717,6 @@
 					if (file_exists($icons_dir . "/$id.ico")) {
 						unlink($icons_dir . "/$id.ico");
 					}
-					} else if ($id < -10) {
-
-						$label_id = -$id - 11;
-
-						db_query($link, "DELETE FROM ttrss_labels
-						  	WHERE	id = '$label_id' AND owner_uid = " . $_SESSION["uid"]);
-					}
 				}
 			}
 		}

tt-rss.js

@@ -562,6 +562,11 @@ function quickMenuGo(opid) {
 				return;
 			}	
 
+			if (actid <= 0) {
+				alert(__("You can't unsubscribe from this kind of feed."));
+				return;
+			}	
+
 			if (!actid) {
 				alert(__("Please select some feed first."));
 				return;