From ce2615a316e9f69e48322368c4fdd31523c8d027 Mon Sep 17 00:00:00 2001
From: Michael Meyer <me@entrez.cc>
Date: Tue, 30 Nov 2021 13:45:09 -0500
Subject: [PATCH] Fix: zoo monsters spawning in hallways

If a random G_[SL]GROUP monster was generated in a zoo, the resulting
group of monsters could spill out into nearby hallways and other
surrounding areas.  Disregard G_GROUP flags when filling a zoo with
monsters to avoid this problem.
---
 src/mkroom.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mkroom.c b/src/mkroom.c
index 652b9abb4..1e9de22c5 100644
--- a/src/mkroom.c
+++ b/src/mkroom.c
@@ -340,7 +340,7 @@ fill_zoo(struct mkroom* sroom)
                                              : (type == ANTHOLE)
                                                  ? antholemon()
                                                  : (struct permonst *) 0,
-                          sx, sy, MM_ASLEEP);
+                          sx, sy, MM_ASLEEP | MM_NOGRP);
             if (mon) {
                 mon->msleeping = 1;
                 if (type == COURT && mon->mpeaceful) {