object.h: spelling fix

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

include/qom/object.h

@@ -432,7 +432,7 @@ struct Object
  * @class_base_init: This function is called for all base classes after all
  *   parent class initialization has occurred, but before the class itself
  *   is initialized.  This is the function to use to undo the effects of
- *   memcpy from the parent class to the descendents.
+ *   memcpy from the parent class to the descendants.
  * @class_finalize: This function is called during class destruction and is
  *   meant to release and dynamic parameters allocated by @class_init.
  * @class_data: Data to pass to the @class_init, @class_base_init and