Add private copy of zlib's compressBound function to avoid missing function issues on systems using zlib 1.1.x
Add private copy of zlib's compressBound function to avoid missing
function issues on systems using zlib 1.1.x

Patch by: dberlin

* subversion/libsvn_delta/svndiff.c
  (svnCompressBound): New macro
  (zlib_encode): Use it

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion