SDL: x11: Fix #define name

SDL Commits
1 
From b181eb4ed0e117083e86b66e538492c815c8f899 Mon Sep 17 00:00:00 2001
From: Frank Praznik <[EMAIL REDACTED]>
Date: Fri, 17 Apr 2026 10:28:50 -0400
Subject: [PATCH] x11: Fix #define name

---
 src/video/x11/SDL_x11xinput2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/video/x11/SDL_x11xinput2.c b/src/video/x11/SDL_x11xinput2.c
index 3a94c6a1f0ace..c099589591938 100644
--- a/src/video/x11/SDL_x11xinput2.c
+++ b/src/video/x11/SDL_x11xinput2.c
@@ -542,7 +542,7 @@ void X11_HandleXinput2Event(SDL_VideoDevice *_this, XGenericEventCookie *cookie)
     {
         const XIDeviceEvent *xev = (const XIDeviceEvent *)cookie->data;
 
-#ifdef XINPUT2_USE_KEYBOARD
+#ifdef USE_XINPUT2_KEYBOARD
         SDL_WindowData *windowdata = X11_FindWindow(videodata, xev->event);
         XEvent xevent;