show xml files inline (in browser instead of downloading)

--- eventum-1.7.1/include/class.attachment.php	2006-04-17 15:44:59.762227553 +0300
+++ /tmp/class.attachment.php	2006-04-17 16:18:43.737508323 +0300
@@ -103,7 +103,8 @@
             'png',
             'bmp',
             'html',
-            'htm'
+            'htm',
+            'xml',
         );
     }