With pburba and rhuijben, fix the svnserve tests on Windows.  svnserve was aborting due to a failed assertion, which in turn was due to... my coding error.
With pburba and rhuijben, fix the svnserve tests on Windows.  svnserve
was aborting due to a failed assertion, which in turn was due to...
my coding error.

* subversion/svnserve/serve.c
  (serve): Use the correct path APIs when manipulating 'root' and
    'repos_root', which are dirents, not fspaths.

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