[-] BO: Fix some bugs on advanced stock management

git-svn-id: http://dev.prestashop.com/svn/v1/branches/1.5.x@16446 b9a71923-0436-4b27-9f14-aed3839534dd

classes/stock/WarehouseProductLocation.php

@@ -132,4 +132,9 @@ class WarehouseProductLocationCore extends ObjectModel
 		$collection->where('id_product', '=', (int)$id_product);
 		return $collection;
 	}
+	
+	public static function getProducts($id_warehouse)
+	{
+		return Db::getInstance()->executeS('SELECT DISTINCT id_product FROM '._DB_PREFIX_.'warehouse_product_location WHERE id_warehouse='.(int)$id_warehouse);		
+	}
 }