view icons/README @ 149:37cb005f7c40

* FFT: fix invalid write of normalisation factor in compact mode of disc cache
* FFT: fix range problem for normalisation factor in compact mode (it was
  stored as an unsigned scaled from an assumed float range of 0->1, which
  is not very plausible and not accurate enough even if true -- use a float
  instead)
* Spectrogram: fix vertical zoom behaviour for log frequency spectrograms:
  make the thing in the middle of the display remain in the middle after zoom
* Overview widget: don't update the detailed waveform if still decoding the
  audio file (too expensive to do all those redraws)

Icons are from various GPL'd sources, including the GIMP image editor,
KDE crystalsvg icon set, Rosegarden audio and MIDI sequencer, and Hydrogen
drum machine.  Some modifications and new drawings by Chris Cannam.