groundwork for window port interface change to add_menu

groundwork only - window port interface change

This changes the last parameter for add_menu() from a boolean
to an unsigned int, to allow additional itemflags in future
beyond just the "preselected" that the original boolean offered.

There shouldn't be any functionality changes with this groundwork-only
change, and if there are it is unintentional and should be reported.

win/curses/cursmain.c

@@ -491,7 +491,7 @@ curses_start_menu(winid wid)
 /*
 add_menu(winid wid, int glyph, const anything identifier,
                                 char accelerator, char groupacc,
-                                int attr, char *str, boolean preselected)
+                                int attr, char *str, unsigned int itemflags)
                 -- Add a text line str to the given menu window.  If identifier
                    is 0, then the line cannot be selected (e.g. a title).
                    Otherwise, identifier is the value returned if the line is
@@ -517,14 +517,15 @@ add_menu(winid wid, int glyph, const anything identifier,
                    The menu commands and aliases take care not to interfere
                    with the default object class symbols.
                 -- If you want this choice to be preselected when the
-                   menu is displayed, set preselected to TRUE.
+                   menu is displayed, set bit MENU_ITEMFLAGS_SELECTED.
 */
 void
 curses_add_menu(winid wid, int glyph, const ANY_P * identifier,
                 CHAR_P accelerator, CHAR_P group_accel, int attr,
-                const char *str, BOOLEAN_P presel)
+                const char *str, unsigned int itemflags)
 {
     int curses_attr;
+    boolean presel = ((itemflags & MENU_ITEMFLAGS_SELECTED) != 0);
 
     attr &= ~(ATR_URGENT | ATR_NOHISTORY);
     curses_attr = curses_convert_attr(attr);