more PR #891 - build fix

More tty-specific hangup handling.  There's still doubt about the
origiinal testing, but not about testing after "post bitrot repair",
if there was any.  That wasn't useful because the new code was
accidentally suppressed by testing a misspelled macro. when deciding
whether to include it.

win/tty/wintty.c

@@ -3421,7 +3421,7 @@ tty_select_menu(winid window, int how, menu_item **menu_list)
 char
 tty_message_menu(char let, int how, const char *mesg)
 {
-    HUPSKIP();
+    HUPSKIP_RESULT('\033');
     /* "menu" without selection; use ordinary pline, no more() */
     if (how == PICK_NONE) {
         pline("%s", mesg);