altos/scheme: Add start/end args to vector->list
authorKeith Packard <keithp@keithp.com>
Wed, 3 Jan 2018 22:57:39 +0000 (14:57 -0800)
committerKeith Packard <keithp@keithp.com>
Wed, 3 Jan 2018 22:58:30 +0000 (14:58 -0800)
This is an r7rs extension which allows you to extract a subset of the
vector.

Signed-off-by: Keith Packard <keithp@keithp.com>

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