bounding-index-designator type not right

[csrhodes]

Hi,

SICL/Code/Types/type-proclamations-to-move.lisp

Line 108 in c355fcb

'(or integer nil))

A google search took me here, so drive-by bug report: (or integer nil) is the same as integer. You probably meant (or integer null), but there's an asymmetry between the start designator (which must be an integer) and the end designator (which is an integer, or NIL to mean the length of the sequence).