* fix out-of-bounds crash in AudioFileProcessor
by correctly setting m_from and m_to without them interfering with each other
* fixed flattened wave caused by inaccurate math
see PR for before/after
* simply stop drawing AFP waveform when there's no more data
this fixes the single point at the end of waveforms that sometimes shows up
* fixed seemingly insignificant type confusion (?)
execution seemed fine but my debugger started freaking out,
and if gdb is telling me I got a negative-sized vector,
I'd rather fix this issue than speculate "it's probably fine"
* fixed data offset for AFP waveform vis
the data itself isn't reversed, so we have to account for that
0363ee6d16