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Declare all args (per C99).

SCHARS, SBYTES, STRING_INTERVALS, SREF, SDATA; explicit size_byte references
left unchanged for now.

(record_delete, record_insert): Use it.

with lisp system changes.

read-only text that is so because of text properties.

`end'.

current buffer is read-only, not if it isn't.

applying XBUFFER to it.

* keymap.c (where_is_internal): Pass lisp object, not integer, to Faref.

XBUFFER on last_undo_buffer which might not be a buffer.

comparing pointers.

apart.

Verify correct object type before returning pointer, using eassert.
* frame.h (XFRAME): Likewise.

* buffer.c (Frename_buffer, Fset_buffer_multibyte,
swap_out_buffer_local_variables, Fmove_overlay): Don't apply XSYMBOL, XBUFFER,
etc, to values that may be nil or of the wrong type.
* data.c (set_internal): Likewise.
* dispextern.h (WINDOW_WANTS_MODELINE_P, WINDOW_WANTS_HEADER_LINE_P): Likewise.
* fileio.c (auto_save_1): Likewise.
* insdel.c (check_markers): Likewise.
* marker.c (buf_charpos_to_bytepos, unchain_marker): Likewise.
* undo.c (record_insert): Likewise.
* vmsproc.c (child_sig): Likewise.
* window.c (unshow_buffer, window_loop): Likewise.
* xterm.c (x_erase_phys_cursor): Likewise.

no record other than marker adjustment before undo boundary.

(record_change): Call record_delete the new way.

record_property_change): Declare it as void.

after markers (the ordinary kind of insertion).

(Fprimitive_undo): Handle marker-adjustment elements.

just because a previous-modtime doesn't match any more.

Use SAVE_MODIFF and BUF_SAVE_MODIFF
instead of direct access to the save_modiff field.

Use new accessor macros instead of calling XSET directly.

Check argument type before calling XINT.

(record_delete): Test last_point_position_buffer.

(pending_boundary): New variable.
(syms_of_undo): Initialize it.
(Fundo_boundary): Use pending_boundary.
(record_insert, record_delete, record_property_change):
Set pending_boundary.