JNI: fix java descriptor for set_extents call
JNI: fix java descriptor for set_extents call

Bug: https://bugzilla.gnome.org/show_bug.cgi?id=751951

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