Original commit message from CVS:
* docs/libs/gstreamer-libs-sections.txt:
* libs/gst/controller/gstcontroller.c: (gst_controller_unset),
(gst_controller_unset_all):
* libs/gst/controller/gstcontroller.h:
Added new method _unset_all() and fixed _unset()
* tests/check/libs/controller.c: (GST_START_TEST),
(gst_controller_suite):
Added two testcases for new and fixed method