SDL_image: cmake: always build vendored zlib as static library

SDL Commits
1 
From 4d22f6c2e48b9b2b3389f4913a647823ac7dca94 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Fri, 2 Jan 2026 03:04:38 +0100
Subject: [PATCH] cmake: always build vendored zlib as static library

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 873fb7dc..e884a21e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -218,7 +218,7 @@ if(SDLIMAGE_VENDORED AND SDLIMAGE_PNG_VENDORED)
 else()
     set(SDLIMAGE_ZLIB_VENDORED OFF)
 endif()
-cmake_dependent_option(SDLIMAGE_ZLIB_SHARED "Build zlib as a shared library" "${SDLIMAGE_PNG_SHARED}" SDLIMAGE_ZLIB_VENDORED OFF)
+set(SDLIMAGE_ZLIB_SHARED OFF)
 
 # Save BUILD_SHARED_LIBS variable
 set(SDLIMAGE_BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS})