From 5d4a4ca7fb6b21d7da25a1408aa9f32892939d41 Mon Sep 17 00:00:00 2001
From: nhmall <nhmall@nethack.org>
Date: Sat, 16 Dec 2023 11:11:30 -0500
Subject: [PATCH] Revert "remove mon guard from
 _see_with_infrared(mon),_is_safemon(mon)"

This reverts commit 91fdc1104a0927a7916dd6bdd9821e9a46c955d7 while an
issue is investigated further..
---
 include/display.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/display.h b/include/display.h
index b5b08c36d..20c6cead6 100644
--- a/include/display.h
+++ b/include/display.h
@@ -104,7 +104,7 @@
  * canseemon() or canspotmon() which already check that.
  */
 #define _see_with_infrared(mon) \
-    (!Blind && Infravision && infravisible(mon->data) \
+    (!Blind && Infravision && mon && infravisible(mon->data) \
      && couldsee(mon->mx, mon->my))
 
 /*
@@ -157,7 +157,7 @@
  * definition here is convenient.  No longer limited to pets.
  */
 #define _is_safemon(mon) \
-    (flags.safe_dog && (mon)->mpeaceful && canspotmon(mon)     \
+    (flags.safe_dog && (mon) && (mon)->mpeaceful && canspotmon(mon)     \
      && !Confusion && !Hallucination && !Stunned)
 
 /*