fixed bug in Doctrine_Query::copy() - params were not copied

lib/Doctrine/Query.php

@@ -1448,7 +1448,6 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
                                     . $table->getColumnName($table->getIdentifier())
                                     . ' = '
                                     . $assocAlias . '.' . $relation->getForeign();
-  
                     }
 
                     $this->parts['from'][] = $queryPart;
@@ -1641,6 +1640,13 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
         return $this->execute($params, $hydrationMode);
     }
 
+    /**
+     * Copies a Doctrine_Query object.
+     *
+     * @param Doctrine_Query   Doctrine query instance.
+     *                         If ommited the instance itself will be used as source.
+     * @return Doctrine_Query  Copy of the Doctrine_Query instance.
+     */
     public function copy(Doctrine_Query $query = null)
     {
         if ( ! $query) {
@@ -1649,6 +1655,7 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
 
         $new = new Doctrine_Query();
         $new->_dqlParts = $query->_dqlParts;
+        $new->_params = $query->_params;
         $new->_hydrationMode = $query->_hydrationMode;
 
         return $new;