sdl12-compat: set cmake maximum policy to 3.5.

SDL Commits
1 
From 4aa491ec84db46d37c8903aa64d8b893cf315b73 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Wed, 26 Jul 2023 20:50:50 +0300
Subject: [PATCH] set cmake maximum policy to 3.5.

hand-picked from SDL2 commit https://github.com/libsdl-org/SDL/commit/14f4fd3f11b4bc5bded6960c7c6118ea06ad86ac
---
 CMakeLists.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d3bb6f6ee..87f594201 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@
 #        you can define SDL2_INCLUDE_DIR on the cmdline.  For example:
 #        cmake -DSDL2_INCLUDE_DIR=/opt/SDL2/include/SDL2 [other stuff]
 
-cmake_minimum_required(VERSION 3.0.0)
+cmake_minimum_required(VERSION 3.0.0...3.5)
 project(sdl12_compat
         VERSION 1.2.65
         LANGUAGES C)
@@ -16,7 +16,7 @@ if(STATICDEVEL AND NOT (CMAKE_SYSTEM_NAME MATCHES "Linux"))
 endif()
 
 list(APPEND CMAKE_MODULE_PATH
-    "${CMAKE_CURRENT_LIST_DIR}/cmake/modules"
+  "${CMAKE_CURRENT_LIST_DIR}/cmake/modules"
 )
 
 include(CheckCSourceCompiles)