feedtree: don't request null icon

include/functions.php

@@ -1851,6 +1851,8 @@
 			}
 			break;
 		}
+
+		return false;
 	}
 
 	function getFeedTitle($link, $id, $cat = false) {

js/FeedTree.js

@@ -100,7 +100,7 @@ dojo.declare("fox.FeedTree", dijit.Tree, {
 	_createTreeNode: function(args) {
 		var tnode = new dijit._TreeNode(args);
 
-		if (args.item.icon)
+		if (args.item.icon && args.item.icon[0])
 			tnode.iconNode.src = args.item.icon[0];
 
 		var id = args.item.id[0];