fill-last-line breaks line height

[pgundlach]

<Layout
  xmlns="urn:speedata.de:2009/publisher/en"
  xmlns:sd="urn:speedata:2009/publisher/functions/en"
  version="3.7.4"
>
  
  <!--<Trace grid="yes" gridallocation="yes"/>-->
  <SetGrid height="8.5pt" nx="10"/>

  <DefineFontfamily name="text" fontsize="7.7pt" leading="8.5pt">
    <Regular fontface="sans"/>
  </DefineFontfamily>
  
  <DefineTextformat name="text" fill-last-line="40"/>
  
  <Record element="data">
    <Output>
      <Text textformat="text">
        <Paragraph>
          <Value select="sd:dummytext()"></Value>
          <Value>Ü</Value>
        </Paragraph>
      </Text>
    </Output>
    <Output>
      <Text>
        <Paragraph>
          <Value>X</Value>
        </Paragraph>
      </Text>
    </Output>
  </Record>
</Layout>

gives an extra empty line.