SDL: cmake: correctly report SDL_LEAN_AND_MEAN state at end of configuration

SDL Commits
1 
From 3686cbdca2af2493f1c8a4fb33a3b286a865b851 Mon Sep 17 00:00:00 2001
From: stahta01 <[EMAIL REDACTED]>
Date: Wed, 17 Jun 2026 14:35:37 -0400
Subject: [PATCH] cmake: correctly report SDL_LEAN_AND_MEAN state at end of
 configuration

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

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d763e292e3c56..2fd4c0db652e3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -652,6 +652,7 @@ if(SDL_LEAN_AND_MEAN)
     PRIVATE
       SDL_LEAN_AND_MEAN
   )
+  set(HAVE_LEAN_AND_MEAN TRUE)
 endif()
 
 # Compiler option evaluation