SDL: Reset simulated presentation timeline when vsync status changes

SDL Commits
1 
From 1663cb41961baa288ac7400286eef3df90b31295 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Thu, 15 Sep 2022 06:30:19 -0700
Subject: [PATCH] Reset simulated presentation timeline when vsync status
 changes

---
 src/render/SDL_render.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/render/SDL_render.c b/src/render/SDL_render.c
index 0930d80f2b0..c0b0032b13e 100644
--- a/src/render/SDL_render.c
+++ b/src/render/SDL_render.c
@@ -4575,6 +4575,7 @@ SDL_RenderSetVSync(SDL_Renderer * renderer, int vsync)
     }
 
     renderer->wanted_vsync = vsync ? SDL_TRUE : SDL_FALSE;
+    renderer->last_present = 0;
 
     if (!renderer->SetVSync ||
         renderer->SetVSync(renderer, vsync) < 0) {