winex11.drv: Set correct cursor when setting cursor from another thread.

dlls/winex11.drv/mouse.c

@@ -1503,7 +1503,8 @@ void X11DRV_SetCursor( HCURSOR handle )
         NtGetTickCount() - last_cursor_change > 100)
     {
         last_cursor_change = NtGetTickCount();
-        if (cursor_window) send_notify_message( cursor_window, WM_X11DRV_SET_CURSOR, 0, (LPARAM)handle );
+        if (cursor_window) send_notify_message( cursor_window, WM_X11DRV_SET_CURSOR,
+                                                GetCurrentThreadId(), (LPARAM)handle );
     }
 }
 

dlls/winex11.drv/window.c

@@ -2996,15 +2996,26 @@ LRESULT X11DRV_WindowMessage( HWND hwnd, UINT msg, WPARAM wp, LPARAM lp )
         X11DRV_resize_desktop( (BOOL)lp );
         return 0;
     case WM_X11DRV_SET_CURSOR:
+    {
+        Window win = 0;
+
         if ((data = get_win_data( hwnd )))
         {
-            Window win = data->whole_window;
+            win = data->whole_window;
             release_win_data( data );
-            if (win) set_window_cursor( win, (HCURSOR)lp );
         }
         else if (hwnd == x11drv_thread_data()->clip_hwnd)
-            set_window_cursor( x11drv_thread_data()->clip_window, (HCURSOR)lp );
+            win = x11drv_thread_data()->clip_window;
+
+        if (win)
+        {
+            if (wp == GetCurrentThreadId())
+                set_window_cursor( win, (HCURSOR)lp );
+            else
+                sync_window_cursor( win );
+        }
         return 0;
+    }
     case WM_X11DRV_CLIP_CURSOR_NOTIFY:
         return clip_cursor_notify( hwnd, (HWND)wp, (HWND)lp );
     case WM_X11DRV_CLIP_CURSOR_REQUEST: