From 0d87f2555a39e4f0f6c1faa0e3b4044bd3ab6599 Mon Sep 17 00:00:00 2001
From: Adrien Destugues <pulkomandy@pulkomandy.tk>
Date: Tue, 29 Sep 2020 20:01:03 +0200
Subject: [PATCH] app_server: missing null pointer check.

Should fix #16551.
---
 src/servers/app/ScreenConfigurations.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/servers/app/ScreenConfigurations.cpp b/src/servers/app/ScreenConfigurations.cpp
index 386c8cd216..36656d532d 100644
--- a/src/servers/app/ScreenConfigurations.cpp
+++ b/src/servers/app/ScreenConfigurations.cpp
@@ -157,6 +157,10 @@ float
 ScreenConfigurations::Brightness(int32 id)
 {
 	screen_configuration* configuration = fConfigurations.ItemAt(0);
+
+	if (configuration == NULL)
+		return -1;
+
 	return configuration->brightness;
 }