Don't try to compress/decompress where there's a Content-Range.

According to RFC2616, the range would have to apply *after*
applying content-encoding, so anything that's been set before
running the deflate filter is going to be broken.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@563154 13f79535-47bb-0310-9956-ffa450edef68