* server/util_filter.c (ap_save_brigade): Be more tolerant of a bucket

type which neither implements ->setaside nor morphs on ->read, such as
the mod_perl SV bucket type in mod_perl <1.99_17; defer returning an
error in this case until after calling setaside on each bucket.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@105664 13f79535-47bb-0310-9956-ffa450edef68