From b770d387bf93479c18deb7bccc4faf05278f4494 Mon Sep 17 00:00:00 2001
From: Callan Bryant <callan.bryant@gmail.com>
Date: Mon, 26 Oct 2020 22:39:08 +0000
Subject: [PATCH] fix unititialised IPNet marshalling

---
 exttypes.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/exttypes.go b/exttypes.go
index d43c6af..8e67fa5 100644
--- a/exttypes.go
+++ b/exttypes.go
@@ -24,7 +24,11 @@ func (n *JSONIPNet) UnmarshalJSON(b []byte) error {
 }
 
 func (n *JSONIPNet) String() string {
-	return n.IPNet.String()
+	if len(n.IPNet.IP) == 0 {
+		return "\"\""
+	} else {
+		return n.IPNet.String()
+	}
 }
 
 type JSONKey struct {