SDL_mixer: cmake: set GME_UNRAR to OFF for vendored libgme

SDL Commits
1 
From 605b4968fdf1e8001f10c3ae139c9db31cc37f93 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Mon, 23 Oct 2023 17:23:30 +0300
Subject: [PATCH] cmake: set GME_UNRAR to OFF for vendored libgme

(for git devel version of libgme)
---
 CMakeLists.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5e20b249..ba02adc3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -701,6 +701,7 @@ if(SDL3MIXER_GME)
         set(ENABLE_UBSAN OFF)
         set(BUILD_FRAMEWORK OFF)
         set(GME_ZLIB OFF)
+        set(GME_UNRAR OFF)
         message(STATUS "Using vendored libgme")
         sdl_check_project_in_subfolder(external/libgme libgme SDL3MIXER_VENDORED)
         add_subdirectory(external/libgme EXCLUDE_FROM_ALL)