SDL: replaced line comments in public header.

SDL Commits
1 
From 4f7f72c257165ecd30654f80d8b45fcc02d608da Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sat, 4 Feb 2023 10:02:10 +0300
Subject: [PATCH] replaced line comments in public header.

---
 include/SDL_opengl_glext.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/SDL_opengl_glext.h b/include/SDL_opengl_glext.h
index f5da65d8f230..ff6ad12cef04 100644
--- a/include/SDL_opengl_glext.h
+++ b/include/SDL_opengl_glext.h
@@ -1,6 +1,6 @@
-// SDL modified the include guard to be compatible with Mesa and Apple include guards:
-// - Mesa uses: __gl_glext_h_
-// - Apple uses: __glext_h_
+/* SDL modified the include guard to be compatible with Mesa and Apple include guards:
+ * - Mesa uses: __gl_glext_h_
+ * - Apple uses: __glext_h_  */
 #if !defined(__glext_h_) && !defined(__gl_glext_h_)
 #define __glext_h_ 1
 #define __gl_glext_h_ 1