Allow to disable display of line numbers beyond EOB

* src/buffer.c (disable_line_numbers_overlay_at_eob): New
function.
* src/lisp.h (disable_line_numbers_overlay_at_eob): Add prototype.
* src/xdisp.c (should_produce_line_number): When at ZV, call
disable_line_numbers_overlay_at_eob to determine whether line
numbers should be displayed beyond ZV.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/lisp.h b/src/lisp.h
index ff8dde2b825..f5cb6c75706 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -3965,6 +3965,7 @@ extern void syms_of_editfns (void);
 
 /* Defined in buffer.c.  */
 extern bool mouse_face_overlay_overlaps (Lisp_Object);
+extern Lisp_Object disable_line_numbers_overlay_at_eob (void);
 extern _Noreturn void nsberror (Lisp_Object);
 extern void adjust_overlays_for_insert (ptrdiff_t, ptrdiff_t);
 extern void adjust_overlays_for_delete (ptrdiff_t, ptrdiff_t);