wayland: Also check tools for cursor usage during cursor destruction

(cherry picked from commit 35a80bdf1f114550d7e84b8a6478180bcf132267)

src/video/wayland/SDL_waylandevents_c.h

@@ -189,7 +189,6 @@ typedef struct SDL_WaylandSeat
         struct zwp_pointer_gesture_pinch_v1 *gesture_pinch;
 
         SDL_WindowData *focus;
-        SDL_CursorData *current_cursor;
 
         // According to the spec, a seat can only have one active gesture of any type at a time.
         SDL_WindowData *gesture_focus;

src/video/wayland/SDL_waylandmouse.c

@@ -897,7 +897,7 @@ static void Wayland_FreeCursorData(SDL_CursorData *d)
     // Stop any frame callbacks and detach buffers associated with the cursor being destroyed.
     wl_list_for_each (seat, &video_data->seat_list, link)
     {
-        if (seat->pointer.current_cursor == d) {
+        if (seat->pointer.cursor_state.current_cursor == d) {
             Wayland_CursorStateDestroyFrameCallback(&seat->pointer.cursor_state);
 
             // Custom cursor buffers are about to be destroyed, so ensure they are detached.
@@ -905,7 +905,21 @@ static void Wayland_FreeCursorData(SDL_CursorData *d)
                 wl_surface_attach(seat->pointer.cursor_state.surface, NULL, 0, 0);
             }
 
-            seat->pointer.current_cursor = NULL;
+            seat->pointer.cursor_state.current_cursor = NULL;
+        }
+
+        SDL_WaylandPenTool *tool;
+        wl_list_for_each (tool, &seat->tablet.tool_list, link) {
+            Wayland_CursorStateDestroyFrameCallback(&tool->cursor_state);
+
+            if (tool->cursor_state.current_cursor == d) {
+                // Custom cursor buffers are about to be destroyed, so ensure they are detached.
+                if (!d->is_system_cursor && tool->cursor_state.surface) {
+                    wl_surface_attach(seat->pointer.cursor_state.surface, NULL, 0, 0);
+                }
+
+                tool->cursor_state.current_cursor = NULL;
+            }
         }
     }