add metadata version

copy_this/modules/d3usersonline/metadata.php

@@ -1,8 +1,12 @@
 <?php
+/**
+ * Metadata version
+ */
+$sMetadataVersion = '1.0';
+
 /**
  * Module information
  */
-$sMetadataVersion = '1.0';
 $aModule = array(
     'id'           => 'd3useronline',
     'title'        => oxLang::getInstance()->translateString('D3_USERONLINE_METADATA_TITLE'),