From 57919bf75b3031f3abab6d697de2ce354588a38d Mon Sep 17 00:00:00 2001
From: Matthijs Kooijman <matthijs@stdin.nl>
Date: Mon, 4 Jan 2010 20:54:32 +0100
Subject: [PATCH] Treat undefined variables as empty string in tests.

This prevents warnings when using comparison attributes together with
variables that are undefined.
---
 general/interpolate_fancy | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/general/interpolate_fancy b/general/interpolate_fancy
index c455769..4b8b759 100644
--- a/general/interpolate_fancy
+++ b/general/interpolate_fancy
@@ -155,6 +155,11 @@ sub do_interpolate {
 
 sub _test {
   my($variable, $attr) = @_;
+  # If the variable is not defined, treat it as the empty string in
+  # comparisons below
+  if (!defined $variable) { 
+    $variable = '';
+  }
   my $attributes = interpolate_fancy::_attributes($attr);
 
   defined $attributes->{eq} and return $variable eq $attributes->{eq};
-- 
2.30.2