ccache: skip non-numeric feeds (e.g. tags)

backend.php

@@ -275,12 +275,12 @@
 			/* Updating a label ccache means recalculating all of the caches
 			 * so for performance reasons we don't do that here */
 
-			if (time() - $_SESSION["viewfeed:ccache_update_stamp"] > 120) {
+//			if (time() - $_SESSION["viewfeed:ccache_update_stamp"] > 120) {
 				if ($feed >= 0) {
 					ccache_update($link, $feed, $_SESSION["uid"], $cat_view);
 				}
 				$_SESSION["viewfeed:ccache_update_stamp"] = time();
-			}
+//			}
 
 			set_pref($link, "_DEFAULT_VIEW_MODE", $view_mode);
 			set_pref($link, "_DEFAULT_VIEW_LIMIT", $limit);

functions.php

@@ -5684,6 +5684,8 @@
 	function ccache_find($link, $feed_id, $owner_uid, $is_cat = false, 
 		$no_update = false) {
 
+		if (!is_numeric($feed_id)) return;
+
 		if (!$is_cat) {
 			$table = "ttrss_counters_cache";
 		} else {
@@ -5715,6 +5717,8 @@
 	function ccache_update($link, $feed_id, $owner_uid, $is_cat = false, 
 		$update_pcat = true) {
 
+		if (!is_numeric($feed_id)) return;
+
 		$prev_unread = ccache_find($link, $feed_id, $owner_uid, $is_cat, true);
 
 		/* When updating a label, all we need to do is recalculate feed counters