From 2c57d5e768f1992fd6a21229ee1a270ff536b1f7 Mon Sep 17 00:00:00 2001
From: Rachael Alexanderson <madame-rachelle@users.noreply.github.com>
Date: Sun, 14 Jun 2020 15:33:26 -0400
Subject: [PATCH] - fix crash in nullptr access to DFrameBuffer object 'screen'
 if it is uninitialized

---
 src/p_setup.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/p_setup.cpp b/src/p_setup.cpp
index 0c902bd2f97..346a2a5cb06 100644
--- a/src/p_setup.cpp
+++ b/src/p_setup.cpp
@@ -366,8 +366,8 @@ void FLevelLocals::ClearLevelData()
 	localEventManager->Shutdown();
 	if (aabbTree) delete aabbTree;
 	aabbTree = nullptr;
-	screen->SetAABBTree(nullptr);
-
+	if (screen)
+		screen->SetAABBTree(nullptr);
 }
 
 //==========================================================================