backport

diff --git a/include/plugin_api.inc.php b/include/plugin_api.inc.php
index e343a6c821c2977563e28d67c154433b2003e3c0..0eef23b9d5540f35571c1ae7d70999cd17fe7040 100644 (file)
--- a/include/plugin_api.inc.php
+++ b/include/plugin_api.inc.php
@@ -1490,7 +1490,7 @@ class serendipity_event extends serendipity_plugin {
             } else {
                 $key = &$eventData[$fieldname];
             }
-        } elseif (isset($eventData[0][$fieldname])) {
+        } elseif (is_array($eventData[0]) && isset($eventData[0][$fieldname])) {
             $key = &$eventData[0][$fieldname];
         } elseif (isset($eventData[$fieldname])) {
             $key = &$eventData[$fieldname];