From 377d54ef0a064ce24feab05cdbb0733f9967b84d Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Wed, 2 Jan 2019 15:17:54 +0100
Subject: train_subtype: return undef if unknown

---
 lib/Travel/Status/DE/DBWagenreihung.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib/Travel/Status/DE')

diff --git a/lib/Travel/Status/DE/DBWagenreihung.pm b/lib/Travel/Status/DE/DBWagenreihung.pm
index 8b0d6cc..962211a 100644
--- a/lib/Travel/Status/DE/DBWagenreihung.pm
+++ b/lib/Travel/Status/DE/DBWagenreihung.pm
@@ -207,7 +207,7 @@ sub train_subtype {
 	if ( $ml{ $likelihood[0] } <= 2 ) {
 
 		# inconclusive
-		return '???';
+		return undef;
 	}
 
 	return $likelihood[0];
-- 
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