Remove the attempt to pass the cache key into the lock functions, use

cache->key instead for this. Fixes a segfault caused when cache->key
was populated, but the passed in key was not.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1004220 13f79535-47bb-0310-9956-ffa450edef68