Oracle don't close cursor

When you doing a big loop of insertion you have a "too many open cursor".
The problem is in Doctrine_Connection class
At line 1005 you should replace :
$stmt = $this->prepare($query);
by
$stmt = $this->dbh->prepare($query);

and at line 1041 you should replace :
$stmt = $this->prepare($query);
by
$stmt = $this->dbh->prepare($query);

After this correction, you never have the problem "too many open cursor"

Thanks to Ota to point that on google groups.
http://groups.google.com/group/doctrine-user/browse_thread/thread/fe6cd03c8fb18b64/728ec1b4e42b1f0b?lnk=gst&q=doctrine_oracle_adapter#728ec1b4e42b1f0b