SDL: Fixed windows build (1ef18)

From 1ef18c7677c72c4b2b5b4648e338061ac7edf986 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Fri, 26 May 2023 09:50:18 -0700
Subject: [PATCH] Fixed windows build

---
 src/hidapi/SDL_hidapi_windows.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hidapi/SDL_hidapi_windows.h b/src/hidapi/SDL_hidapi_windows.h
index b09b0457eaad..e0fbd473e4d5 100644
--- a/src/hidapi/SDL_hidapi_windows.h
+++ b/src/hidapi/SDL_hidapi_windows.h
@@ -26,7 +26,7 @@
 #define malloc      SDL_malloc
 #define memcmp      SDL_memcmp
 #define swprintf    SDL_swprintf
-#define towupper    SDL_toupper
+#define towupper    (wchar_t)SDL_toupper
 #define wcscmp      SDL_wcscmp
 #define _wcsdup     SDL_wcsdup
 #define wcslen      SDL_wcslen