Could somebody with a clue please check this change?

[David Kastrup]

Problem is that saving match-data does not save last_thing_searched,
and this is used in several instances.  Previously,

(set-match-data (match-data t))

was not a noop.  Also the match-data saved through filters etc did
not include last_thing_searched.

Now I have no clue about Lisp data structures, what garbage gets
collected, whether one can just assign a Lisp_Object containing a
buffer and so on.  So please somebody check whether I did something
incredibly stupid here.

Thanks.

txteHPyQnp6Cd.txt
Description: Text Data

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum