From efd6d2cf07ecd061a516491c53125028f6d36026 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Tue, 13 Dec 2022 14:38:32 +0100
Subject: [PATCH] - fix initialization issues with a few serializer functions.

---
 source/games/duke/src/savegame.cpp | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/source/games/duke/src/savegame.cpp b/source/games/duke/src/savegame.cpp
index 085ef4d9b..63f9c4586 100644
--- a/source/games/duke/src/savegame.cpp
+++ b/source/games/duke/src/savegame.cpp
@@ -294,7 +294,11 @@ void DDukeActor::Serialize(FSerializer& arc)
 FSerializer& Serialize(FSerializer& arc, const char* keyname, Cycler& w, Cycler* def)
 {
 	static Cycler nul;
-	if (!def) def = &nul;
+	if (!def)
+	{
+		def = &nul;
+		if (arc.isReading()) w = {};
+	}
 	if (arc.BeginObject(keyname))
 	{
 		arc("sector", w.sector, def->sector)
@@ -311,7 +315,11 @@ FSerializer& Serialize(FSerializer& arc, const char* keyname, Cycler& w, Cycler*
 FSerializer& Serialize(FSerializer& arc, const char* keyname, AmbientTags& w, AmbientTags* def)
 {
 	static AmbientTags nul;
-	if (!def) def = &nul;
+	if (!def)
+	{
+		def = &nul;
+		if (arc.isReading()) w = {};
+	}
 	if (arc.BeginObject(keyname))
 	{
 		arc("lotag", w.lo, def->lo)
@@ -324,7 +332,11 @@ FSerializer& Serialize(FSerializer& arc, const char* keyname, AmbientTags& w, Am
 FSerializer& Serialize(FSerializer& arc, const char* keyname, animate& w, animate* def)
 {
 	static animate nul;
-	if (!def) def = &nul;
+	if (!def)
+	{
+		def = &nul;
+		if (arc.isReading()) w = {};
+	}
 	if (arc.BeginObject(keyname))
 	{
 		arc("sector", w.sect, def->sect)