FIX for PHP 5.5.0

serendipity_event_nl2br.php.diff

diff --git a/plugins/serendipity_event_nl2br/serendipity_event_nl2br.php b/plugins/serendipity_event_nl2br/serendipity_event_nl2br.php
index 37ceae6..532937b 100644
--- a/plugins/serendipity_event_nl2br/serendipity_event_nl2br.php
+++ b/plugins/serendipity_event_nl2br/serendipity_event_nl2br.php
@@ -152,8 +152,12 @@ class serendipity_event_nl2br extends serendipity_event
     }
 
     function restore($text) {
-        global $_buf;
-        return preg_replace('~\001(\d+)~e', '$_buf[$1]', $text);
+        return preg_replace_callback('~\001(\d+)~',
+                                     function ($m) {
+                                       global $_buf;
+                                      return strtoupper($_buf[$m[1]]);
+                                     },
+                                     $text);
     }
 
     function event_hook($event, &$bag, &$eventData, $addData = null) {