Fix an unused variable warning on windows.
Fix an unused variable warning on windows.

* subversion/libsvn_client/export.c
  (copy_versioned_files): Move variable declaration into tighter scope, and
    only declare it if it will be used.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@873595 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion