Better check on blank tag

diff --git a/actions/tagrss.php b/actions/tagrss.php
index 00e549281b51a1ef978360bac9da42b5d15a3490..8a146156950aa129bc2b1dc6b536c8cb12c188a0 100644 (file)
--- a/actions/tagrss.php
+++ b/actions/tagrss.php
@@ -28,7 +28,7 @@ class TagrssAction extends Rss10Action {
        function init() {
                $tag = $this->trimmed('tag');
 
-        if (!$tag) {
+        if (!isset($tag) || mb_strlen($tag) == 0) {
                        common_user_error(_('No tag.'));
                        return false;
         }