Followup to r23139,23145: correct the test condition for Windows platforms.
Followup to r23139,23145: correct the test condition for Windows platforms.

* subversion/tests/cmdline/special_tests.py
  (checkout_repo_with_symlinks): Look for the correct contents depending
    on the platform: The symlink file isn't empty on Windows.

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