[SoundRecorder] crashes in RawDecoder::Decode ()

[diver]

This is hrev39914, gcc4hybrid.

• Record a short clip
• Expand main window
• Select and deselect "Audio Clip 1" a few times

  Thread 2157 caused an exception: Segment violation
  [...]
  [Switching to team /boot/system/apps/SoundRecorder (2148) thread Scope view (2157)]
  0x02a10b02 in RawDecoder::Decode ()
     from /boot/system/add-ons/media/plugins/raw_decoder
  (gdb) bt
  #0  0x02a10b02 in RawDecoder::Decode ()
     from /boot/system/add-ons/media/plugins/raw_decoder
  #1  0x00520b79 in BMediaTrack::ReadFrames () from /boot/system/lib/libmedia.so
  #2  0x00520c88 in BMediaTrack::ReadFrames () from /boot/system/lib/libmedia.so
  #3  0x0021cdb9 in ScopeView::ComputeRendering<short, long long> ()
  #4  0x0021bd9b in ScopeView::RenderLoop ()
  #5  0x0021be41 in ScopeView::RenderLaunch ()
  #6  0x007fe044 in thread_entry () from /boot/system/lib/libroot.so
  #7  0x70102fec in ?? ()
  (gdb)
  

[diver]

Can't reproduce anymore.