Merge r1679712 from trunk:

Follow up to r1679181: fix warning (return discards qualifiers from pointer target type).

Submitted by: ylavic
Reviewed by: trawick, rjung


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1681590 13f79535-47bb-0310-9956-ffa450edef68