line-height attribute does not work for table rows with empty cel ls

[t_...@agency.com]

Hi everybody!

  line-height attribute for fo:table-row does not work if I have only cells
without text.

In the example below the first line (with a dot in the block) has correct
height, 
but the second one is very small.

Should the row have correct height even if it contains no text?
Can anybody propose workaround?

Example:

<fo:table>
<fo:table-column column-width="60mm"/>
<fo:table-body>
  <fo:table-row line-height="4cm">
    <fo:table-cell background-color="red">
      <fo:block> s
      </fo:block>
    </fo:table-cell>
  </fo:table-row>
  <fo:table-row line-height="4cm">
    <fo:table-cell background-color="green">
      <fo:block>
      </fo:block>
    </fo:table-cell>
  </fo:table-row>
</fo:table-body>
</fo:table>

I use the latest CVS snapshot.

Thanks
Andriy Palamarchuk