Fix attempt to parse 5-digit times as time German dates

src/NodaTimeSplitter.php

@@ -314,6 +314,7 @@ final class NodaTimeSplitter {
             return [];
         }
 
+        if (strlen($datum) <= 6) return [];
         if (strlen($datum) <= 9) $use_day = false;
         else $use_day = true;