From a45e464d6ff0b86074415b75a8cda905b79a6556 Mon Sep 17 00:00:00 2001
From: Armin Novak <armin.novak@thincast.com>
Date: Wed, 10 Jan 2024 17:02:26 +0100
Subject: [PATCH] [client,SDL] check for timer initialized

before manipulating SDL timers check if the SDL subsystem was actually
initialized. Fixes #9736
---
 client/SDL/sdl_disp.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/client/SDL/sdl_disp.cpp b/client/SDL/sdl_disp.cpp
index ec110995d..3735dc15a 100644
--- a/client/SDL/sdl_disp.cpp
+++ b/client/SDL/sdl_disp.cpp
@@ -293,6 +293,9 @@ UINT sdlDispContext::sendLayout(const rdpMonitor* monitors, size_t nmonitors)
 
 BOOL sdlDispContext::addTimer()
 {
+	if (SDL_WasInit(SDL_INIT_TIMER) == 0)
+		return FALSE;
+
 	SDL_RemoveTimer(_timer);
 	WLog_Print(_sdl->log, WLOG_TRACE, "adding new display check timer");