From b44486e7cc185eb6f967b8b3f17fe30e1934dce7 Mon Sep 17 00:00:00 2001
From: Pasi Kallinen <paxed@alt.org>
Date: Sun, 1 Nov 2015 01:44:10 +0200
Subject: [PATCH] Prevent array underflow

---
 src/sounds.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/sounds.c b/src/sounds.c
index e73890a92..5c0107f50 100644
--- a/src/sounds.c
+++ b/src/sounds.c
@@ -16,8 +16,9 @@ struct monst *mon;
 int rmtyp;
 {
     int rno = levl[mon->mx][mon->my].roomno;
-
-    return rooms[rno - ROOMOFFSET].rtype == rmtyp;
+    if (rno >= ROOMOFFSET)
+        return rooms[rno - ROOMOFFSET].rtype == rmtyp;
+    return FALSE;
 }
 
 void
-- 
2.50.1