[2.0] fixes #2478 Add/persist/retrieve was doubling the resultset of...

[2.0] fixes #2478 Add/persist/retrieve was doubling the resultset of collection is solved. It was a merge in PersistentCollection creation. I am not 100% sure it is the right patch, but it works and does not break any other unit tests

lib/Doctrine/ORM/Internal/Hydration/ObjectHydrator.php

@@ -138,8 +138,15 @@ class ObjectHydrator extends AbstractHydrator
         $class = $this->_ce[get_class($entity)];
         $relation = $class->associationMappings[$name];
         
-        $pColl = new PersistentCollection($this->_em, $this->_ce[$relation->targetEntityName],
-                $class->reflFields[$name]->getValue($entity) ?: new ArrayCollection);
+        $pColl = new PersistentCollection(
+            $this->_em, 
+            $this->_ce[$relation->targetEntityName],
+            /*
+            TICKET #2478: This seems to double resultset in Collections after add/persist/retrieve execution
+            $class->reflFields[$name]->getValue($entity) ?: new ArrayCollection
+            */
+            new ArrayCollection()
+        );
         
         $pColl->setOwner($entity, $relation);
         $class->reflFields[$name]->setValue($entity, $pColl);