[PATCH] kconfig "choice" fixes

This fixes "choice" behaviour - it sets the correct default and fixes
oldconfig.

scripts/kconfig/conf.c

@@ -342,6 +342,8 @@ static int conf_choice(struct menu *menu)
 		case ask_new:
 		case ask_silent:
 		case ask_all:
+			if (is_new)
+				sym->flags |= SYMBOL_NEW;
 			conf_askvalue(sym, menu_get_prompt(def_menu));
 			strip(line);
 			break;

scripts/kconfig/symbol.c

@@ -204,7 +204,8 @@ void sym_calc_value(struct symbol *sym)
 					sym_calc_value(prop->def);
 					newval = prop->def->curr;
 				}
-			}
+			} else
+				S_TRI(newval) = S_TRI(sym->def);
 		} else
 			newval = sym->def;