Fix invisible mouse pointers on Windows.

* src/w32fns.c: Include windowsx.h.
(w32_wnd_proc): If the mouse moved and the mouse pointer is
invisible, make it visible again even when the main (Lisp)
thread is busy.
* src/w32term.c (w32_toggle_invisible_pointer): Rather then
garbaging the frame have the input thread call SetCursor.

1 files changed, 2 insertions, 6 deletions

diff --git a/src/w32term.c b/src/w32term.c
index 7c5f2db3a4c..fbd31b15de2 100644
--- a/src/w32term.c
+++ b/src/w32term.c
@@ -6613,14 +6613,10 @@ w32_toggle_invisible_pointer (struct frame *f, bool invisible)
   if (f->pointer_invisible != invisible)
     {
       f->pointer_invisible = invisible;
-      SET_FRAME_GARBAGED (f);
+      w32_define_cursor (FRAME_W32_WINDOW (f),
+                         f->output_data.w32->current_cursor);
     }
 
-  if (invisible)
-    SetCursor (NULL);
-  else
-    SetCursor (f->output_data.w32->current_cursor);
-
   unblock_input ();
 }