emacs-28 e3d5337: Fix mouse handling with several TTY frames on MS-Windows

[Eli Zaretskii]

branch: emacs-28
commit e3d5337970585d1e47a4942048edf8261ad5b781
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    Fix mouse handling with several TTY frames on MS-Windows
    
    * src/w32inevt.c (do_mouse_event): Reset the 'mouse_moved' flag of
    the selected frame.  Without that, this flag might remain set on a
    TTY frame that is not displayed.
---
 src/w32inevt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/w32inevt.c b/src/w32inevt.c
index 9a69b32..894bc3a 100644
--- a/src/w32inevt.c
+++ b/src/w32inevt.c
@@ -470,6 +470,9 @@ do_mouse_event (MOUSE_EVENT_RECORD *event,
   DWORD but_change, mask, flags = event->dwEventFlags;
   int i;
 
+  /* Mouse didn't move unless MOUSE_MOVED says it did.  */
+  SELECTED_FRAME ()->mouse_moved = 0;
+
   switch (flags)
     {
     case MOUSE_MOVED: