From 4aec31b1ac1111a0d1c7bbc91107d3f0ed664b18 Mon Sep 17 00:00:00 2001
From: teastep <teastep@fbd18981-670d-0410-9b5c-8dc0c1a9a2bb>
Date: Tue, 1 May 2007 21:23:21 +0000
Subject: [PATCH] Fix port 0 in macro invocation

git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@6183 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
---
 Shorewall-perl/Shorewall/Macros.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Shorewall-perl/Shorewall/Macros.pm b/Shorewall-perl/Shorewall/Macros.pm
index 8ab5cf35f..4e806732d 100644
--- a/Shorewall-perl/Shorewall/Macros.pm
+++ b/Shorewall-perl/Shorewall/Macros.pm
@@ -112,7 +112,7 @@ sub merge_macro_source_dest( $$ ) {
 sub merge_macro_column( $$ ) {
     my ( $body, $invocation ) = @_;
 
-    if ( $invocation ) {
+    if ( defined $invocation and $invocation ne '' ) {
 	return ( $body || '') if $invocation eq '-';
 	$invocation || '';
     } else {