feeds: fix JSON output when there are no subscribed feeds

functions.php

@@ -4262,7 +4262,6 @@
 			}
 		}
 	
-	
 /*		if (get_pref($link, 'ENABLE_FEED_CATS')) {
 			if (get_pref($link, "FEEDS_SORT_BY_UNREAD")) {
 				$order_by_qpart = "order_id,category,unread DESC,title";
@@ -4277,6 +4276,8 @@
 			}
 		} */
 
+		/* real feeds */
+
 		if ($enable_cats)
 			$order_by_qpart = "ttrss_feed_categories.order_id,category,
 				ttrss_feeds.order_id,title";
@@ -4304,7 +4305,7 @@
 
 		$actid = $_REQUEST["actid"];
 
-		/* real feeds */
+		if (db_num_rows($result) > 0) {
 
 			$category = "";
 	
@@ -4354,6 +4355,8 @@
 				$feedlist['items'] = array_merge($feedlist['items'], $cat['items']);
 			}
 
+		}
+
 		return $feedlist;
 	}