From 6f2d1536b8ce0bd746c87c00466170435ddb3923 Mon Sep 17 00:00:00 2001
From: Joey Hess <joey@kodama.kitenet.net>
Date: Mon, 4 Aug 2008 14:58:21 -0400
Subject: improve fix to DTRT for a param of "0"

---
 IkiWiki.pm | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/IkiWiki.pm b/IkiWiki.pm
index 051c11b43..207bf3079 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -1043,7 +1043,9 @@ sub preprocess ($$$;$$) { #{{{
 		my $prefix=shift;
 		my $command=shift;
 		my $params=shift;
-		if (length $escape) {
+		$params="" if ! defined $params;
+
+		f (length $escape) {
 			return "[[$prefix$command $params]]";
 		}
 		elsif (exists $hooks{preprocess}{$command}) {
@@ -1176,8 +1178,7 @@ sub preprocess ($$$;$$) { #{{{
 		}sx;
 	}
 
-	# $4 can be undef if the directive was [[!foo]]
-	$content =~ s{$regex}{$handle->($1, $2, $3, ($4 or ""))}eg;
+	$content =~ s{$regex}{$handle->($1, $2, $3, $4)}eg;
 	return $content;
 } #}}}
 
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