From 286d7ce56f2a98a2ba9db2cd34234379fb91eeb6 Mon Sep 17 00:00:00 2001
From: Joe Atzberger <atz@esilibrary.com>
Date: Tue, 22 Jun 2010 15:38:30 +0000
Subject: [PATCH] Tiny comment

---
 Sip.pm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Sip.pm b/Sip.pm
index 8c64a43..d2d2713 100644
--- a/Sip.pm
+++ b/Sip.pm
@@ -94,7 +94,8 @@ sub add_field {
 #
 # maybe_add(field_id, value):
 #    If value is defined and non-empty, then return the
-#    constructed field value, otherwise return the empty string
+#    constructed field value, otherwise return the empty string.
+#    NOTE: if zero is a valid value for your field, don't use maybe_add!
 #
 sub maybe_add {
     my ($fid, $value) = @_;
-- 
2.11.0