From 064d6f9411ac7991a2f6e4c5dcf3bd1d2d42831c Mon Sep 17 00:00:00 2001
From: Caitlin Hennessy <caitlin.hennessy@microsoft.com>
Date: Mon, 4 Dec 2017 12:24:41 -0800
Subject: [PATCH] Check if sound not defined

---
 libs/music/sounds.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libs/music/sounds.ts b/libs/music/sounds.ts
index 464b0e5f..42c9be73 100644
--- a/libs/music/sounds.ts
+++ b/libs/music/sounds.ts
@@ -284,6 +284,7 @@ namespace music {
     //% blockId=music_play_sound_effect block="play sound effect %sound"
     //% weight=99
     export function playSoundEffect(sound: Sound) {
+        if (!sound) return;
         control.runInBackground(() => sound.play());
     }
 }