fl and nulls

[dan sutton]

Hi,

In Solr 1.3 it looks like null fields were returned if requested with the fl
param,, whereas with solr 1.4, nulls are omitted entirely.

Is there a way to have the nulls returned with Solr 1.4 e.g.
...
<doc>
 <field1/>
 <field2/>
</doc>

Cheers,
Dan