FIX do not force rowid to int (#36412)

* do not force rowid to int

* Update commonobject.class.php

---------

Co-authored-by: Laurent Destailleur <eldy@destailleur.fr>

htdocs/core/class/commonobject.class.php

@@ -8369,7 +8369,7 @@ abstract class CommonObject
 									$isDependList = 1;
 								}
 
-								$data[(int) $obj->rowid] = $labeltoshow;
+								$data[$obj->rowid] = $labeltoshow;	// Warning: $obj->rowid is an alias and can be an int, but also a string ref.
 							}
 
 							$i++;