File fix-save-bug.patch of Package doom64ex-plus

From 9f149163d74eed69b56a5294537ed12c2a6b2cf3 Mon Sep 17 00:00:00 2001
From: bubbleguuum <bubbleguuum@free.fr>
Date: Fri, 13 Jun 2025 01:04:18 +0200
Subject: [PATCH 1/2] Fix sequenceGlow_t not being correctly read from save

It was wrecking havoc in T_Sequence() function on save load,
causing heap buffer overflow in that fuynction and
weird visual lighting glitches on save load
---
 src/engine/p_saveg.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/engine/p_saveg.c b/src/engine/p_saveg.c
index 5bfff765..cbb5afbf 100644
--- a/src/engine/p_saveg.c
+++ b/src/engine/p_saveg.c
@@ -813,7 +813,8 @@ static void saveg_write_sequenceGlow_t(void* data) {
 static void saveg_read_sequenceGlow_t(void* data) {
     sequenceGlow_t* seq = (sequenceGlow_t*)data;
     seq->sector = &sectors[saveg_read32()];
-    seq->headsector = &sectors[saveg_read32() - 1];
+    int pos = saveg_read32();
+    seq->headsector = pos == 0 ? NULL: &sectors[pos-1];
     seq->count = saveg_read32();
     seq->start = saveg_read32();
     seq->index = saveg_read32();

From 225bc0ffb1adfd2632ed81fde44e0df6330907c0 Mon Sep 17 00:00:00 2001
From: bubbleguuum <bubbleguuum@free.fr>
Date: Fri, 13 Jun 2025 01:22:56 +0200
Subject: [PATCH 2/2] rewritten for consistency with similar code

---
 src/engine/p_saveg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/engine/p_saveg.c b/src/engine/p_saveg.c
index cbb5afbf..368361e1 100644
--- a/src/engine/p_saveg.c
+++ b/src/engine/p_saveg.c
@@ -814,7 +814,7 @@ static void saveg_read_sequenceGlow_t(void* data) {
     sequenceGlow_t* seq = (sequenceGlow_t*)data;
     seq->sector = &sectors[saveg_read32()];
     int pos = saveg_read32();
-    seq->headsector = pos == 0 ? NULL: &sectors[pos-1];
+    seq->headsector = pos > 0 ? &sectors[pos - 1] : NULL;
     seq->count = saveg_read32();
     seq->start = saveg_read32();
     seq->index = saveg_read32();