SDL_image: Fix `WINDOWS` to `WIN32`

SDL Commits
1 
From c37c316cce394eb11f0396b2feed9785525c76af Mon Sep 17 00:00:00 2001
From: AlpRabbit <[EMAIL REDACTED]>
Date: Mon, 27 Mar 2023 01:40:13 +0900
Subject: [PATCH] Fix `WINDOWS` to `WIN32`

---
 cmake/PrivateSdlFunctions.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmake/PrivateSdlFunctions.cmake b/cmake/PrivateSdlFunctions.cmake
index f01f8621..0f11b245 100644
--- a/cmake/PrivateSdlFunctions.cmake
+++ b/cmake/PrivateSdlFunctions.cmake
@@ -220,7 +220,7 @@ function(sdl_target_link_options_no_undefined TARGET)
             target_link_options(${TARGET} PRIVATE "-Wl,-undefined,error")
         else()
             sdl_check_linker_flag("-Wl,--no-undefined" HAVE_WL_NO_UNDEFINED)
-            if(HAVE_WL_NO_UNDEFINED AND NOT ((CMAKE_C_COMPILER_ID MATCHES "Clang") AND WINDOWS))
+            if(HAVE_WL_NO_UNDEFINED AND NOT ((CMAKE_C_COMPILER_ID MATCHES "Clang") AND WIN32))
                 target_link_options(${TARGET} PRIVATE "-Wl,--no-undefined")
             endif()
         endif()