From 1cd80a33c62112c850c11050c7671285d7124065 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sa=C3=BAl=20Ibarra=20Corretg=C3=A9?= <saghul@jitsi.org>
Date: Thu, 15 Sep 2022 17:12:43 +0200
Subject: [PATCH] fix(config) fix check for filmstrip property

The whole object might be undefined.
---
 react/features/base/config/middleware.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/react/features/base/config/middleware.ts b/react/features/base/config/middleware.ts
index 87e75eb84..21c86abd2 100644
--- a/react/features/base/config/middleware.ts
+++ b/react/features/base/config/middleware.ts
@@ -74,7 +74,7 @@ function _setConfig({ dispatch, getState }: IStore, next: Function, action: AnyA
         }));
     }
 
-    if (action.config.filmstrip.stageFilmstripParticipants !== undefined) {
+    if (action.config.filmstrip?.stageFilmstripParticipants !== undefined) {
         dispatch(updateSettings({
             maxStageParticipants: action.config.filmstrip.stageFilmstripParticipants
         }));