Fixed small issue

diff --git a/files/lib/system/exporter/IPB3xExporter.class.php b/files/lib/system/exporter/IPB3xExporter.class.php
index d52ae8dffdc26db2aa75bb05f64de7e81f097e4a..03a6cb94a38bb91ef05613040152c0c4474fc083 100644 (file)
--- a/files/lib/system/exporter/IPB3xExporter.class.php
+++ b/files/lib/system/exporter/IPB3xExporter.class.php
@@ -583,7 +583,7 @@ class IPB3xExporter extends AbstractExporter {
                        ImportHandler::getInstance()->getImporter('com.woltlab.wcf.conversation.user')->import(0, array(
                                'conversationID' => $row['map_topic_id'],
                                'participantID' => $row['map_user_id'],
-                               'username' => $row['name'],
+                               'username' => ($row['name'] ?: ''),
                                'hideConversation' => ($row['map_left_time'] ? 1 : 0),
                                'isInvisible' => 0,
                                'lastVisitTime' => $row['map_read_time']