* atk/atkaction.h atk/atkcomponent.h atk/atkeditabletext.h
atk/atkhyperlink.h atk/atkimage.h atk/atkobject.h
atk/atkrelationset.h atk/atkselection.h atk/atkstreamablecontent.h
atk/atktable.h atk/atktext.h atk/atkvalue.h:
Add padding to class structures to allow for future expansion.