fix broken feed counter updates

functions.js

@@ -308,7 +308,7 @@ if (!xmlhttp_rpc && typeof XMLHttpRequest!='undefined') {
 function label_counters_callback() {
 	if (xmlhttp_rpc.readyState == 4) {
 
-		if (!xmlhttp.responseXML) {
+		if (!xmlhttp_rpc.responseXML) {
 			notify("label_counters_callback: backend did not return valid XML");
 			return;
 		}

tt-rss.js

@@ -80,7 +80,7 @@ function refetch_callback() {
 		if (!reply) {
 			notify("refetch_callback: backend did not return expected XML object");
 			return;
-		}
+		} 
 
 		var f_document = window.frames["feeds-frame"].document;