Empty table cells are skipped

[pbb72]

Wiki code:

{|
| A1 ||    || A3
|-
| B1 || B2 || B3
|}

Mediawiki output:

<table>
<tr>
<td> A1 </td>
<td>    </td>
<td> A3
</td></tr>
<tr>
<td> B1 </td>
<td> B2 </td>
<td> B3
</td></tr></table>

Wikicloth output:

<table><tbody><tr><td>
A1
</td><td>
A3
</td></tr><tr><td>
B1
</td><td>
B2
</td><td>
B3
</td></tr></tbody></table>

Note the missing empty <td> in the Wikicloth output.