defvar of bookmark-make-record-function breaks org-capture

[David Engster <deng@xxxxxxxxxxxxxxx>]

For a while now, I wondered why sometimes org-capture would throw an
error when I entered new notes.  I finally found that in
w3m-bookmark.el, there's

(defvar bookmark-make-record-function nil)

which of course breaks any package using this when w3m-bookmark was
loaded first, including org-capture.

-David