Fix DOM_RET_OBJ calls for 8.4

[remicollet]

From UPGRADING.INTERNALS

   - Removed the `ret` argument from the DOM_RET_OBJ macro, use the return
     value instead.

Notice: was already using return_value by default (at least since 7.0), because of strange macro def.

#define DOM_RET_OBJ(obj, ret, domobject) \
	*ret = php_dom_create_object(obj, return_value, domobject)

[chschneider]

Are the reasons not to merge this request and release a PHP 8.4 compatible version? We're using xmldiff and would be happy to remove this 8.4 blocker :-)

[nielsdos]

I pinged some people to get this merged.

[derickr]

I've merged this, and released version 1.1.4.