From 8263e0a0c65b531871c533e4be49cba5813ed95f Mon Sep 17 00:00:00 2001
From: Martin Kamerbeek <martin@webgui-svn>
Date: Sun, 24 Aug 2008 11:00:21 +0000
Subject: [PATCH] fix: getLineageLength called on undef in case no pages are in
 the nav loop

---
 lib/WebGUI/Asset/Wobject/Navigation.pm | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/WebGUI/Asset/Wobject/Navigation.pm b/lib/WebGUI/Asset/Wobject/Navigation.pm
index ea9c1e6d6..d5b22030c 100644
--- a/lib/WebGUI/Asset/Wobject/Navigation.pm
+++ b/lib/WebGUI/Asset/Wobject/Navigation.pm
@@ -401,7 +401,13 @@ sub view {
 	my $currentLineage = $current->get("lineage");
 	my $lineageToSkip = "noskip";
 	my $absoluteDepthOfLastPage;
-    my $absoluteDepthOfFirstPage = $assets->[0]->getLineageLength;
+
+    # Get the lineage 'depth' of the first asset if there are any assets at all
+    my $absoluteDepthOfFirstPage = exists $assets->[0]
+                                 ? $assets->[0]->getLineageLength
+                                 : 0
+                                 ;
+ 
 	my %lastChildren;
 	my $previousPageData = undef;
 	my $eh = $self->session->errorHandler;