bug#55798: font-lock-fontify-syntactically-region uses point without initializing it.

[Alan Mackenzie]

Hello, Emacs.

Emacs master branch:

* emacs/lisp/font-lock.el (font-lock-fontify-syntactically-region): At
line 26 of this function, appears:

    (setq state (parse-partial-sexp (point) end nil nil state
                                    'syntax-table))

..  However, there is no goto-char or other way of setting point earlier
in the function (except in one arm of an `if' form).  Neither is point
defined to have a defined setting at the entry to the function.

This is a bug.

-- 
Alan Mackenzie (Nuremberg, Germany).