axe some warnings:

mod_dav_lock.c:72: warning: no previous prototype for `dav_generic_get_lockdb_path'
locks.c: In function `dav_generic_really_open_lockdb':
locks.c:356: warning: unused variable `db'
locks.c: In function `dav_generic_load_lock_record':
locks.c:606: warning: unused variable `buf'
locks.c: In function `dav_generic_remove_lock':
locks.c:1081: warning: unused variable `buf'


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@101121 13f79535-47bb-0310-9956-ffa450edef68