From 448aec5d405d70c19ab69ef4656e4cc758130715 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Thu, 2 Sep 2021 15:33:17 +0200
Subject: [PATCH] SDL now makes sure the mutex is not NULL before attempting to
 lock it.

---
 src/win/win_sdl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/win/win_sdl.c b/src/win/win_sdl.c
index bebad43dd..8a748fb2b 100644
--- a/src/win/win_sdl.c
+++ b/src/win/win_sdl.c
@@ -288,7 +288,8 @@ sdl_destroy_texture(void)
 void
 sdl_close(void)
 {
-    SDL_LockMutex(sdl_mutex);
+    if (sdl_mutex != NULL)
+	SDL_LockMutex(sdl_mutex);
 
     /* Unregister our renderer! */
     video_setblit(NULL);