From 05c0f95e692d22939d732984faa825c0ed781736 Mon Sep 17 00:00:00 2001
From: Andrew McMillan <andrew@morphoss.com>
Date: Wed, 24 Mar 2010 22:14:39 +1300
Subject: [PATCH] Avoid unassigned warning.

---
 inc/CalDAVPrincipal.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/inc/CalDAVPrincipal.php b/inc/CalDAVPrincipal.php
index d27dba3c..af70f9ef 100644
--- a/inc/CalDAVPrincipal.php
+++ b/inc/CalDAVPrincipal.php
@@ -366,7 +366,7 @@ class CalDAVPrincipal
     @dbg_error_log( 'principal', 'Path split into at least /// %s /// %s /// %s', $path_split[1], $path_split[2], $path_split[3] );
 
     $username = $path_split[1];
-    if ( $path_split[1] == 'principals' ) $username = $path_split[3];
+    if ( $path_split[1] == 'principals' && isset($path_split[3]) ) $username = $path_split[3];
     if ( substr($username,0,1) == '~' ) $username = substr($username,1);
 
     if ( isset($options['allow_by_email']) && $options['allow_by_email'] && preg_match( '#^(\S+@\S+[.]\S+)$#', $username) ) {