SolrQuery.getStart(), SolrQuery.getRows(), always return null

[Thijs]

I'm running into a problem where the calls to SolrQuery.getStart(), 
SolrQuery.getRows() always return null
I'm using trunk of 1.3
I think I also found the problem.
If I use SolrQuery.setRows(20), the value is set in the LinkedHashMap 
with the key-values {"rows", {"20"}} in method set() (line 66 in 
ModifiableSolrParams)
However when I use  SolrQuery.getRows(), the values are retrieved 
through SolrParams.getIntField("rows", null) --> 
SolrParams.getFieldParam. This method first calls method fpname("rows", 
null) which returns "f.rows.null" and that value is used as key in 
ModifiableSolrParams to get the value from the LinkedHashMap. This of 
course will return nothing because that key is not in the hashmap.
So if I change methode fpname in SolrParams to

protected String fpname(String field, String param) {
   return "field+(param==null?"":param);
//    return "f."+field+'.'+param;
 }

it works and getStart en  getRows returns the values previously set.

I'm not sure this is the correct solution, could someone have a look and 
if ok, commit it to the codebase?

Thanks

Thijs