From b686137d12d8adb5920210b9cf9085738267a51b Mon Sep 17 00:00:00 2001
From: toaster <rollerorbital@gmail.com>
Date: Sat, 22 Oct 2022 19:56:13 +0100
Subject: [PATCH] Correctly NULL thumbnailPic and minimapPic when map lumpnum
 changes

Fixes the core part of Chengi's graphical issue
---
 src/p_setup.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/p_setup.c b/src/p_setup.c
index 0901d2156..518683816 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -4506,11 +4506,13 @@ UINT8 P_InitMapData(INT32 numexistingmapheaders)
 			if (mapheaderinfo[i]->thumbnailPic)
 			{
 				Patch_Free(mapheaderinfo[i]->thumbnailPic);
+				mapheaderinfo[i]->thumbnailPic = NULL;
 			}
 
 			if (mapheaderinfo[i]->minimapPic)
 			{
 				Patch_Free(mapheaderinfo[i]->minimapPic);
+				mapheaderinfo[i]->minimapPic = NULL;
 			}
 
 			// Now apply the new ones!