Original commit message from CVS:
* gst/spectrum/gstspectrum.c: (gst_spectrum_event),
(gst_spectrum_transform_ip):
Fix leaking buffers.
* tests/check/Makefile.am:
* tests/check/elements/spectrum.c: (setup_spectrum),
(cleanup_spectrum), (GST_START_TEST), (spectrum_suite), (main):
Add simple test for spectrum element.