patch 9.0.1763: crash when passing invalid buffer to undotree() Commit: https://github.com/vim/vim/commit/ab9f2ecfd4ecaf74eeed0e5ec41355589af3ec8f Author: zeertzjq <zeertzjq@outlook.com> Date: Sun Aug 20 18:35:10 2023 +0200 patch 9.0.1763: crash when passing invalid buffer to undotree() Problem: crash when passing invalid buffer to undotree() Solution: Use get_buf_arg() instead of tv_get_buf_from_arg(). closes: #12862 closes: #12830 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: zeertzjq <zeertzjq@outlook.com>

/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 */

#ifdef __QNXNTO__
# include <sys/procmgr.h>
#endif

#define	USE_TMPNAM

#define POSIX	    // Used by pty.c

#if defined(FEAT_GUI_PHOTON)
extern int is_photon_available;
#endif