Possibly invalid regex in "sorter" utility for [dir-meta-addr]

[dolamroth]

sorter man does not explicitly say this, but the code implies, that its last argument [dir-meta-addr] should accept INODE, which usually includes both digits and hyphens. However, regexp for [dir-meta-addr] accepts only digits.

sleuthkit/tools/sorter/sorter.base

Line 459 in 5621aac

if ($tmpimg =~ /^\d+$/) {

Suggestion: change /^\d+$/ to /^(\d|\-)+$/