Make sure the X event is an Xkb event before checking the Xkb event type

src/video/x11/SDL_x11events.c

@@ -808,7 +808,8 @@ X11_DispatchEvent(_THIS, XEvent *xevent)
             if (SDL_GetKeyboardFocus() != NULL) {
                 X11_ReconcileKeyboardState(_this);
             }
-        } else if (xevent->type == MappingNotify || xkbEvent->any.xkb_type == XkbStateNotify) {
+        } else if (xevent->type == MappingNotify ||
+                   (xevent->type == videodata->xkb_event && xkbEvent->any.xkb_type == XkbStateNotify)) {
             /* Has the keyboard layout changed? */
             const int request = xevent->xmapping.request;
 

src/video/x11/SDL_x11keyboard.c

@@ -278,7 +278,7 @@ X11_InitKeyboard(_THIS)
         int xkb_major = XkbMajorVersion;
         int xkb_minor = XkbMinorVersion;
 
-        if (X11_XkbQueryExtension(data->display, NULL, NULL, NULL, &xkb_major, &xkb_minor)) {
+        if (X11_XkbQueryExtension(data->display, NULL, &data->xkb_event, NULL, &xkb_major, &xkb_minor)) {
             data->xkb = X11_XkbGetMap(data->display, XkbAllClientInfoMask, XkbUseCoreKbd);
         }
 

src/video/x11/SDL_x11video.h

@@ -143,6 +143,7 @@ typedef struct SDL_VideoData
 #if SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
     XkbDescPtr xkb;
 #endif
+    int xkb_event;
 
     KeyCode filter_code;
     Time    filter_time;