improvements in acl plugin to avoid missing var errors

lib/plugins/acl/admin.php

@@ -268,7 +268,10 @@ class admin_plugin_acl extends DokuWiki_Admin_Plugin {
         usort($data,array($this,'_tree_sort'));
         $count = count($data);
         if($count>0) for($i=1; $i<$count; $i++){
-            if($data[$i-1]['id'] == $data[$i]['id'] && $data[$i-1]['type'] == $data[$i]['type']) unset($data[$i]);
+            if($data[$i-1]['id'] == $data[$i]['id'] && $data[$i-1]['type'] == $data[$i]['type']) {
+                unset($data[$i]);
+                $i++;  // duplicate found, next $i can't be a duplicate, so skip forward one
+            }
         }
         return $data;
     }
@@ -496,8 +499,11 @@ class admin_plugin_acl extends DokuWiki_Admin_Plugin {
         }
 
         // highlight?
-        if( ($item['type']== $this->current_item['type'] && $item['id'] == $this->current_item['id']))
+        if( ($item['type']== $this->current_item['type'] && $item['id'] == $this->current_item['id'])) {
             $cl = ' cur';
+        } else {
+            $cl = '';
+        }
 
         // namespace or page?
         if($item['type']=='d'){