SDL: SDL_mslib.c: clang-cl does not support `/GL-`

SDL Commits
1 
From 37beabd11c5999e38632151850fd564cc199261e Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Thu, 6 Oct 2022 02:16:07 +0200
Subject: [PATCH] SDL_mslib.c: clang-cl does not support `/GL-`

---
 CMakeLists.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8bad4e746a2b..954c77a96ef6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -739,10 +739,10 @@ if(MSVC)
   endif()
 endif()
 
-if(MSVC)
+if(CMAKE_C_COMPILER_ID STREQUAL "MSVC")
   # Due to a limitation of Microsoft's LTO implementation, LTO must be disabled for memcpy and memset.
   # The same applies to various functions normally belonging in the C library (for x86 architecture).
-  set_property(SOURCE src/stdlib/SDL_mslibc.c APPEND PROPERTY COMPILE_FLAGS /GL-)
+  set_property(SOURCE src/stdlib/SDL_mslibc.c APPEND_STRING PROPERTY COMPILE_FLAGS " /GL-")
 endif()
 
 if(SDL_ASSEMBLY)