Protect against GCing of last_mouse_window

* src/window.c (last_mouse_window): New global var.  All static
instances removed, and all their uses replaced with this global
var.  This fixes a very unlikely bug where last_mouse_window was
GC’ed and a new window created in its place.  It also fixes several
places that assumed NIL_IS_ZERO without static_asserting it.
(init_window_once): Initialize the new var.

1 files changed, 0 insertions, 1 deletions

diff --git a/src/androidterm.c b/src/androidterm.c
index 688f254ee23..e0f66652300 100644
--- a/src/androidterm.c
+++ b/src/androidterm.c
@@ -1179,7 +1179,6 @@ handle_one_android_event (struct android_display_info *dpyinfo,
               && (f == XFRAME (selected_frame)
                   || !NILP (focus_follows_mouse)))
             {
-              static Lisp_Object last_mouse_window;
               Lisp_Object window
                 = window_from_coordinates (f, event->xmotion.x,
                                            event->xmotion.y, 0,