Finish issue #1296 for path->path exports.
Finish issue #1296 for path->path exports.

Patch by: Stefan Küng <steveking@gmx.ch>
(Tweaked by me.)

* subversion/libsvn_client/export.c
  (copy_versioned_files): added "force" parameter which causes this
    function not to error out if a directory already exists.  Also,
    fix a place were an error was not cleared that should have been.
  (svn_client_export): pass the "force" parameter to 
    copy_versioned_files() too.

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