The magnitude output from gstfastspectrum was not initialized for the first fft.
In some cases, the memory would contain data that upon math operations becomes nan.
This causes one or more colours of the moodbar to be generated blank, resulting in missing colours or just plain black moodbars.
- Rewrite gstspectrum (1.0) to use FFTW (2x faster) and emit raw magnitude
values (not log scaled).
- Rewrite the moodbar generation code to be somewhat understandable, and
do it in Clementine instead of gstreamer.