update Duel.SelectDisableField for extra mzone

libduel.cpp

@@ -3459,6 +3459,17 @@ int32 scriptlib::duel_select_disable_field(lua_State * L) {
 		flag = (flag & 0xffffff) | (plist << 24);
 	}
 	flag |= filter | 0xe0e0e0e0;
+	int32 allow_exzone = lua_toboolean(L, 6);
+	if (allow_exzone && pduel->game_field->core.duel_rule >= 4) {
+		if(pduel->game_field->is_location_useable(playerid, LOCATION_MZONE, 5)) {
+			++ct1;
+			flag &= ~0x20;
+		}
+		if(pduel->game_field->is_location_useable(playerid, LOCATION_MZONE, 6)) {
+			++ct1;
+			flag &= ~0x40;
+		}
+	}
 	if(count > ct1 + ct2 + ct3 + ct4)
 		count = ct1 + ct2 + ct3 + ct4;
 	if(count == 0)