Stupid CodeWarrior compiler cant take vars with struct inits.

Ensure that is_v6literal is always initialized

Backports: r1428145, r1436457
Submitted by: fuankg, rpluem



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x-merge-http-strict@1768090 13f79535-47bb-0310-9956-ffa450edef68