From 9f7a7c9352f8d6b230fc7069990bfde10d900fe0 Mon Sep 17 00:00:00 2001
From: Chris Rhodes <iopred@gmail.com>
Date: Wed, 30 Nov 2016 17:59:17 -0800
Subject: [PATCH] Don't stomp on messages or permission overrides on
 ChannelUpdate.

---
 state.go | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/state.go b/state.go
index ee82f13..71d9476 100644
--- a/state.go
+++ b/state.go
@@ -308,8 +308,12 @@ func (s *State) ChannelAdd(channel *Channel) error {
 
 	// If the channel exists, replace it
 	if c, ok := s.channelMap[channel.ID]; ok {
-		channel.Messages = c.Messages
-		channel.PermissionOverwrites = c.PermissionOverwrites
+		if c.Messages != nil {
+			channel.Messages = c.Messages
+		}
+		if c.PermissionOverwrites != nil {
+			channel.PermissionOverwrites = c.PermissionOverwrites
+		}
 
 		*c = *channel
 		return nil