From f3c9fb9c82ac96b75080254b735b0b66a2114169 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 31a5159dc..c40e7a823 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -9347,11 +9347,13 @@ UINT8 P_InitMapData(boolean existingmapheaders)
 			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!