remove return from jaw_component_get_extents
remove return from jaw_component_get_extents

Bug: https://bugzilla.gnome.org/show_bug.cgi?id=742241

GNOME/java-atk-wrapper,thisMagpie/java-atk-wrapper,GNOME/java-atk-wrapper,thisMagpie/java-atk-wrapper,thisMagpie/java-atk-wrapper,GNOME/java-atk-wrapper