Fix error in prepare() for checking group membership

diff --git a/actions/joingroup.php b/actions/joingroup.php
index 45470f0888be7e7edff2509fc9de9850aec6808e..1888ecdab27389420aa5a3e84b8390cb60687e28 100644 (file)
--- a/actions/joingroup.php
+++ b/actions/joingroup.php
@@ -91,7 +91,7 @@ class JoingroupAction extends Action
 
         $cur = common_current_user();
 
-        if ($cur->isMember($group)) {
+        if ($cur->isMember($this->group)) {
             $this->clientError(_('You are already a member of that group'), 403);
             return false;
         }