lib/46620: curses menu scrolling is broken

[gnrp%komkon2.de@localhost]

>Number:         46620
>Category:       lib
>Synopsis:       curses menu scrolling is broken
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lib-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jun 22 11:00:00 +0000 2012
>Originator:     Julian Fagir
>Release:        6.0_BETA
>Organization:
>Environment:
>Description:
Using the menu library from curses, scrolling won't work: When you scroll 
outside the menu size, entries are shown doubled, once marked, once normal, and 
everything looks broken.
>How-To-Repeat:
Compile the following program (`cc -lmenu $name`), execute, and scroll more 
than four lines.


#include <err.h>
#include <errno.h>
#include <menu.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int
main(int argc, char *argv[])
{
        ITEM *mitems[50];
        MENU *mmenu;
        WINDOW *msubwin, *mainwin;
        char buf[BUFSIZ];
        int ch, i;

        for (i = 0; i < sizeof(mitems)/sizeof(ITEM *) - 1; i++) {
                snprintf(buf, sizeof buf, " - %d - ", i);
                warnx("%d", i);
                mitems[i] = new_item(buf, NULL);
        }
        mitems[sizeof(mitems)/sizeof(ITEM *) - 1] = NULL;

        initscr();
        keypad(stdscr, TRUE);
        noecho();
        cbreak();
        mmenu = new_menu(mitems);
        mainwin = newwin(24, 79, 1, 1);
        msubwin = derwin(mainwin, 15, 60, 2, 2);
        wborder(mainwin, 0, 0, 0, 0, 0, 0, 0, 0);
        wborder(msubwin, 0, 0, 0, 0, 0, 0, 0, 0);

        set_menu_win(mmenu, mainwin);
        set_menu_sub(mmenu, msubwin);
        set_menu_format(mmenu, 4, 1);
        post_menu(mmenu);
        wrefresh(mainwin);

        while ((ch = getch()) != '\n') {
                switch (ch) {
                        case KEY_DOWN:
                                menu_driver(mmenu, REQ_NEXT_ITEM);
                                break;
                        case KEY_UP:
                                menu_driver(mmenu, REQ_PREV_ITEM);
                                break;
                        case KEY_NPAGE:
                                menu_driver(mmenu, REQ_SCR_DPAGE);
                                break;
                        case KEY_PPAGE:
                                menu_driver(mmenu, REQ_SCR_UPAGE);
                                break;
                        case KEY_END:
                                menu_driver(mmenu, REQ_LAST_ITEM);
                                break;
                        case KEY_HOME:
                                menu_driver(mmenu, REQ_FIRST_ITEM);
                                break;
                        case '\b':
                                return 1;
                                break; /* NOT REACHED */
                }
                wrefresh(mainwin);
        }

        endwin();
        return 0;
}
>Fix: