get_client_block() returns wrong length if policy is REQUEST_CHUNKED_DECHUNK

PR:	815
Submitted by:	Kenichi Hori <ken@d2.bs1.fc.nec.co.jp>
Reviewed by:	Dean Gaudet, Ralf S. Engelschall, Jim Jagielski


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3@78817 13f79535-47bb-0310-9956-ffa450edef68