FIX : Societe::set_parent() function needs societe object to be fetched to update parent

htdocs/societe/class/societe.class.php

@@ -2468,6 +2468,7 @@ class Societe extends CommonObject
             $resql=$this->db->query($sql);
             if ($resql)
             {
+            	$this->parent = $id;
                 return 1;
             }
             else

htdocs/societe/soc.php

@@ -649,6 +649,7 @@ if (empty($reshook))
     // Set parent company
     if ($action == 'set_thirdparty' && $user->rights->societe->creer)
     {
+    	$object->fetch($socid);
     	$result = $object->set_parent(GETPOST('editparentcompany','int'));
     }