htcacheclean: Fix list options "-a" and "-A".

Without the fix output is empty because there's no filetype
without APR_FINFO_TYPE.
The options are new in 2.4.

Backport of r1433001 from trunk.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1433393 13f79535-47bb-0310-9956-ffa450edef68