mod_ssl: fix ctx passed to ssl_io_filter_error()

Consistently pass the expected bio_filter_in_ctx_t
to ssl_io_filter_error(). 

Submitted By: Yann Ylavic
CVEID: CVE-2017-3169


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1796343 13f79535-47bb-0310-9956-ffa450edef68
