From d70fadda94a46dc65e7880e3c7211df07ed3257f Mon Sep 17 00:00:00 2001
From: Fabian Greffrath <fabian@greffrath.com>
Date: Tue, 6 Jul 2021 08:25:55 +0200
Subject: [PATCH] ignore request to play no sound

i.e. let S_StartSound() return gracefully if (sfx_id == sfx_None).
---
 Source/s_sound.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Source/s_sound.c b/Source/s_sound.c
index a5a2c6f5..525ded01 100644
--- a/Source/s_sound.c
+++ b/Source/s_sound.c
@@ -290,6 +290,10 @@ void S_StartSound(const mobj_t *origin, int sfx_id)
    if(!snd_card || nosfxparm)
       return;
 
+   // [FG] ignore request to play no sound
+   if(sfx_id == sfx_None)
+      return;
+
 #ifdef RANGECHECK
    // check for bogus sound #
    if(sfx_id < 1 || sfx_id > NUMSFX)