SDL: x11: Cast the dot clock value to 64-bit when calculating the refresh rate

SDL Commits
1 
From 6c37d5b57f79eb008be25f71af9dff73f5e7daa0 Mon Sep 17 00:00:00 2001
From: Frank Praznik <[EMAIL REDACTED]>
Date: Tue, 7 Feb 2023 11:41:23 -0500
Subject: [PATCH] x11: Cast the dot clock value to 64-bit when calculating the
 refresh rate

The Xrandr dot clock value is declared as an unsigned long and the result when multiplying by 100 can overflow on a 32-bit system. Explicitly cast it to Sint64 to ensure that no overflow will occur.
---
 src/video/x11/SDL_x11modes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/video/x11/SDL_x11modes.c b/src/video/x11/SDL_x11modes.c
index da58c19fd83d..85701886ad45 100644
--- a/src/video/x11/SDL_x11modes.c
+++ b/src/video/x11/SDL_x11modes.c
@@ -195,7 +195,7 @@ static SDL_bool CheckXRandR(Display *display, int *major, int *minor)
 static float CalculateXRandRRefreshRate(const XRRModeInfo *info)
 {
     if (info->hTotal && info->vTotal) {
-        return ((100 * info->dotClock) / (info->hTotal * info->vTotal)) / 100.0f;
+        return ((100 * (Sint64)info->dotClock) / (info->hTotal * info->vTotal)) / 100.0f;
     }
     return 0.0f;
 }