Fix bug auto_actualize

When auto_actualize was true and there was no feed to refresh,
a message was always showed. Now we check size of array "feeds" and if size is
zero, we don't perform auto_actualize action

p/scripts/main.js

@@ -660,7 +660,7 @@ function init_actualize() {
 		return false;
 	});
 
-	if (auto_actualize_feeds) {
+	if (auto_actualize_feeds && feed_count > 0) {
 		$("#actualize").click();
 	}
 }