This patch originated from a zsh-synatx-highlighting issue:
https://github.com/zsh-users/zsh-syntax-highlighting/issues/375

I think redrawhook() should be called at the end of do_single()
to make sure that zle-line-pre-redraw is run when cycling the results of
a menu completion.


By the way (unrelated):

The hooks (which served me as entry point for finding the right spot for
the path)

#define INSERTMATCHHOOK     (comphooks + 0)
#define MENUSTARTHOOK       (comphooks + 1)
#define COMPCTLMAKEHOOK     (comphooks + 2)
#define COMPCTLCLEANUPHOOK  (comphooks + 3)
#define COMPLISTMATCHESHOOK (comphooks + 4)
...
struct hookdef comphooks[] = {
    HOOKDEF("insert_match", NULL, HOOKF_ALL),
    HOOKDEF("menu_start", NULL, HOOKF_ALL),
    HOOKDEF("compctl_make", NULL, 0),
    HOOKDEF("compctl_cleanup", NULL, 0),
    HOOKDEF("comp_list_matches", ilistmatches, 0),
};

seem to be undocumented.