Remove one of the frees added in r9916. stat_name points to somewhere
within the same string that destfname points to the start of, so
freeing it causes at best a double-free of destfname and more likely a
free of something that isn't even the start of an allocated block.


git-svn-id: svn://svn.tartarus.org/sgt/putty@9974 cda61777-01e9-0310-a592-d414129be87e