From cfc1e6b83d56585bd984fd71ed4f077bdf079d9a Mon Sep 17 00:00:00 2001
From: Arceliar <Arceliar@users.noreply.github.com>
Date: Fri, 25 Oct 2019 18:40:09 -0500
Subject: [PATCH] fix a crash when shutting down if no multicast interfaces are
 configured

---
 src/multicast/multicast.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/multicast/multicast.go b/src/multicast/multicast.go
index 206edab6..4e0b4f35 100644
--- a/src/multicast/multicast.go
+++ b/src/multicast/multicast.go
@@ -124,7 +124,9 @@ func (m *Multicast) _stop() error {
 	if m.platformhandler != nil {
 		m.platformhandler.Stop()
 	}
-	m.sock.Close()
+	if m.sock != nil {
+		m.sock.Close()
+	}
 	return nil
 }