SDL: Silence unused variable warning

SDL Commits
1 
From 371735e95bbeb1bc54020fbb2eade216d381755b Mon Sep 17 00:00:00 2001
From: Brad Smith <[EMAIL REDACTED]>
Date: Tue, 30 Aug 2022 15:45:16 -0400
Subject: [PATCH] Silence unused variable warning

SDL_x11dyn.c:123:17: warning: unused variable 'i' [-Wunused-variable]
            int i;
                ^
---
 src/video/x11/SDL_x11dyn.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/video/x11/SDL_x11dyn.c b/src/video/x11/SDL_x11dyn.c
index 4bfef21e3f3..3c6474a074c 100644
--- a/src/video/x11/SDL_x11dyn.c
+++ b/src/video/x11/SDL_x11dyn.c
@@ -120,7 +120,9 @@ SDL_X11_UnloadSymbols(void)
     /* Don't actually unload if more than one module is using the libs... */
     if (x11_load_refcount > 0) {
         if (--x11_load_refcount == 0) {
+#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
             int i;
+#endif
 
             /* set all the function pointers to NULL. */
 #define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 0;