Fixes 2 bugs in Nyquist: (1) Bug 2706 probably already has a workaround in place, but the original code called snd-samples with ny:all for the maximum length to retrieve, and now that ny:all is bigger than 32-bits, the value was getting truncated. This change fixes legacy code to be 64-bit-aware. (2) allows sounds to be accessed beyond their stop time even when they stop in the middle of a block of samples. For example, this Nyquist prompt no longer generates garbage or crashes:
(setf idur 5000)
(setf impulse (extract-abs 0 (/ idur *sound-srate*) (cue *track*)))
(mult 0.01 (convolve *track* impulse))
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