Make get_datum optional; assume that an interface is always enabled if it is NULL Properties: fix message unref, fix setting of message iter
Make get_datum optional; assume that an interface is always enabled if it is NULL
Properties: fix message unref, fix setting of message iter

gloob/gloob-s-at-spi2-core,GNOME/at-spi2-core,Distrotech/at-spi2-atk,GNOME/at-spi2-atk,gloob/gloob-s-at-spi2-core,Distrotech/at-spi2-atk,GNOME/at-spi2-core,gloob/gloob-s-at-spi2-core,GNOME/at-spi2-core